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Home Machine Learning

Constructing a Сustom MCP Chatbot | In the direction of Knowledge Science

Admin by Admin
July 10, 2025
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What I Discovered in my First 18 Months as a Freelance Information Scientist

Run Your Python Code as much as 80x Sooner Utilizing the Cython Library


a way to standardise communication between AI purposes and exterior instruments or knowledge sources. This standardisation helps to cut back the variety of integrations wanted (from N*M to N+M): 

  • You need to use community-built MCP servers while you want widespread performance, saving time and avoiding the necessity to reinvent the wheel each time.
  • You may as well expose your personal instruments and sources, making them obtainable for others to make use of.

In my earlier article, we constructed the analytics toolbox (a group of instruments that may automate your day-to-day routine). We constructed an MCP server and used its capabilities with current shoppers like MCP Inspector or Claude Desktop. 

Now, we wish to use these instruments straight in our AI purposes. To try this, let’s construct our personal MCP consumer. We’ll write pretty low-level code, which may also offer you a clearer image of how instruments like Claude Code work together with MCP beneath the hood.

Moreover, I wish to implement the function that’s at present (July 2025) lacking from Claude Desktop: the power for the LLM to routinely verify whether or not it has an acceptable immediate template for the duty at hand and use it. Proper now, you need to choose the template manually, which isn’t very handy. 

As a bonus, I may also share a high-level implementation utilizing the smolagents framework, which is good for situations while you work solely with MCP instruments and don’t want a lot customisation.

MCP protocol overview

Right here’s a fast recap of the MCP to make sure we’re on the identical web page. MCP is a protocol developed by Anthropic to standardise the best way LLMs work together with the skin world. 

It follows a client-server structure and consists of three principal parts: 

  • Host is the user-facing software. 
  • MCP consumer is a part inside the host that establishes a one-to-one reference to the server and communicates utilizing messages outlined by the MCP protocol.
  • MCP server exposes capabilities equivalent to immediate templates, sources and instruments. 
Picture by writer

Since we’ve already applied the MCP server earlier than, this time we are going to deal with constructing the MCP consumer. We’ll begin with a comparatively easy implementation and later add the power to dynamically choose immediate templates on the fly.

Yow will discover the total code on GitHub.

Constructing the MCP chatbot

Let’s start with the preliminary setup: we’ll load the Anthropic API key from a config file and regulate Python’s asyncio occasion loop to assist nested occasion loops.

# Load configuration and surroundings
with open('../../config.json') as f:
    config = json.load(f)
os.environ["ANTHROPIC_API_KEY"] = config['ANTHROPIC_API_KEY']

nest_asyncio.apply()

Let’s begin by constructing a skeleton of our program to get a transparent image of the appliance’s high-level structure.

async def principal():
    """Most important entry level for the MCP ChatBot software."""
    chatbot = MCP_ChatBot()
    attempt:
        await chatbot.connect_to_servers()
        await chatbot.chat_loop()
    lastly:
        await chatbot.cleanup()

if __name__ == "__main__":
    asyncio.run(principal())

We begin by creating an occasion of the MCP_ChatBot class. The chatbot begins by discovering obtainable MCP capabilities (iterating via all configured MCP servers, establishing connections and requesting their lists of capabilities). 

As soon as connections are arrange, we are going to initialise an infinite loop the place the chatbot listens to the person queries, calls instruments when wanted and continues this cycle till the method is stopped manually. 

Lastly, we are going to carry out a cleanup step to shut all open connections.

Let’s now stroll via every stage in additional element.

Initialising the ChatBot class

Let’s begin by creating the category and defining the __init__ technique. The primary fields of the ChatBot class are: 

  • exit_stack manages the lifecycle of a number of async threads (connections to MCP servers), making certain that each one connections will probably be closed appropriately, even when we face an error throughout execution. This logic is applied within the cleanup perform.
  • anthropic is a consumer for Anthropic API used to ship messages to LLM.
  • available_tools and available_prompts are the lists of instruments and prompts uncovered by all MCP servers we’re related to. 
  • periods is a mapping of instruments, prompts and sources to their respective MCP periods. This enables the chatbot to route requests to the proper MCP server when the LLM selects a selected software.
class MCP_ChatBot:
  """
  MCP (Mannequin Context Protocol) ChatBot that connects to a number of MCP servers
  and gives a conversational interface utilizing Anthropic's Claude.
    
  Helps instruments, prompts, and sources from related MCP servers.
  """
    
  def __init__(self):
    self.exit_stack = AsyncExitStack() 
    self.anthropic = Anthropic() # Consumer for Anthropic API
    self.available_tools = [] # Instruments from all related servers
    self.available_prompts = [] # Prompts from all related servers  
    self.periods = {} # Maps software/immediate/useful resource names to MCP periods

  async def cleanup(self):
    """Clear up sources and shut all connections."""
    await self.exit_stack.aclose()

Connecting to servers

The primary job for our chatbot is to provoke connections with all configured MCP servers and uncover what capabilities we will use. 

The checklist of MCP servers that our agent can connect with is outlined within the server_config.json file. I’ve arrange connections with three MCP servers:

  • analyst_toolkit is my implementation of the on a regular basis analytical instruments we mentioned within the earlier article, 
  • Filesystem permits the agent to work with recordsdata,
  • Fetch helps LLMs retrieve the content material of webpages and convert it from HTML to markdown for higher readability.
{
  "mcpServers": {
    "analyst_toolkit": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/github/mcp-analyst-toolkit/src/mcp_server",
        "run",
        "server.py"
      ],
      "env": {
          "GITHUB_TOKEN": "your_github_token"
      }
    },
    "filesystem": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-filesystem",
        "/Users/marie/Desktop",
        "/Users/marie/Documents/github"
      ]
    },
    "fetch": {
        "command": "uvx",
        "args": ["mcp-server-fetch"]
      }
  }
}

First, we are going to learn the config file, parse it after which join to every listed server.

async def connect_to_servers(self):
  """Load server configuration and connect with all configured MCP servers."""
  attempt:
    with open("server_config.json", "r") as file:
      knowledge = json.load(file)
    
    servers = knowledge.get("mcpServers", {})
    for server_name, server_config in servers.gadgets():
      await self.connect_to_server(server_name, server_config)
  besides Exception as e:
    print(f"Error loading server config: {e}")
    traceback.print_exc()
    elevate

For every server, we carry out a number of steps to ascertain the connection:

  • On the transport stage, we launch the MCP server as a stdio course of and get streams for sending and receiving messages. 
  • On the session stage, we create a ClientSession incorporating the streams, after which we carry out the MCP handshake by calling initialize technique.
  • We registered each the session and transport objects within the context supervisor exit_stack to make sure that all connections will probably be closed correctly in the long run. 
  • The final step is to register server capabilities. We wrapped this performance right into a separate perform, and we are going to talk about it shortly.
async def connect_to_server(self, server_name, server_config):
    """Hook up with a single MCP server and register its capabilities."""
    attempt:
      server_params = StdioServerParameters(**server_config)
      stdio_transport = await self.exit_stack.enter_async_context(
          stdio_client(server_params)
      )
      learn, write = stdio_transport
      session = await self.exit_stack.enter_async_context(
          ClientSession(learn, write)
      )
      await session.initialize()
      await self._register_server_capabilities(session, server_name)
            
    besides Exception as e:
      print(f"Error connecting to {server_name}: {e}")
      traceback.print_exc()

Registering capabilities includes iterating over all of the instruments, prompts and sources retrieved from the session. Because of this, we replace the interior variables periods (mapping between sources and a selected session between the MCP consumer and server), available_prompts and available_tools.

async def _register_server_capabilities(self, session, server_name):
  """Register instruments, prompts and sources from a single server."""
  capabilities = [
    ("tools", session.list_tools, self._register_tools),
    ("prompts", session.list_prompts, self._register_prompts), 
    ("resources", session.list_resources, self._register_resources)
  ]
  
  for capability_name, list_method, register_method in capabilities:
    attempt:
      response = await list_method()
      await register_method(response, session)
    besides Exception as e:
      print(f"Server {server_name} does not assist {capability_name}: {e}")

async def _register_tools(self, response, session):
  """Register instruments from server response."""
  for software in response.instruments:
    self.periods[tool.name] = session
    self.available_tools.append({
        "title": software.title,
        "description": software.description,
        "input_schema": software.inputSchema
    })

async def _register_prompts(self, response, session):
  """Register prompts from server response."""
  if response and response.prompts:
    for immediate in response.prompts:
        self.periods[prompt.name] = session
        self.available_prompts.append({
            "title": immediate.title,
            "description": immediate.description,
            "arguments": immediate.arguments
        })

async def _register_resources(self, response, session):
  """Register sources from server response."""
  if response and response.sources:
    for useful resource in response.sources:
        resource_uri = str(useful resource.uri)
        self.periods[resource_uri] = session

By the top of this stage, our MCP_ChatBot object has every thing it wants to begin interacting with customers:

  • connections to all configured MCP servers are established,
  • all prompts, sources and instruments are registered, together with descriptions wanted for LLM to grasp learn how to use these capabilities,
  • mappings between these sources and their respective periods are saved, so we all know precisely the place to ship every request.

Chat loop

So, it’s time to begin our chat with customers by creating the chat_loop perform. 

We’ll first share all of the obtainable instructions with the person: 

  • itemizing sources, instruments and prompts 
  • executing a software name 
  • viewing a useful resource 
  • utilizing a immediate template
  • quitting the chat (it’s vital to have a transparent solution to exit the infinite loop).

After that, we are going to enter an infinite loop the place, primarily based on person enter, we are going to execute the suitable motion: whether or not it’s one of many instructions above or making a request to the LLM.

async def chat_loop(self):
  """Most important interactive chat loop with command processing."""
  print("nMCP Chatbot Began!")
  print("Instructions:")
  print("  stop                           - Exit the chatbot")
  print("  @intervals                       - Present obtainable changelog intervals") 
  print("  @                      - View changelog for particular interval")
  print("  /instruments                         - Checklist obtainable instruments")
  print("  /software       - Execute a software with arguments")
  print("  /prompts                       - Checklist obtainable prompts")
  print("  /immediate     - Execute a immediate with arguments")
  
  whereas True:
    attempt:
      question = enter("nQuery: ").strip()
      if not question:
          proceed

      if question.decrease() == 'stop':
          break
      
      # Deal with useful resource requests (@command)
      if question.startswith('@'):
        interval = question[1:]
        resource_uri = "changelog://intervals" if interval == "intervals" else f"changelog://{interval}"
        await self.get_resource(resource_uri)
        proceed
      
      # Deal with slash instructions
      if question.startswith('/'):
        elements = self._parse_command_arguments(question)
        if not elements:
          proceed
            
        command = elements[0].decrease()
        
        if command == '/instruments':
          await self.list_tools()
        elif command == '/software':
          if len(elements) < 2:
            print("Utilization: /software   ")
            proceed
            
          tool_name = elements[1]
          args = self._parse_prompt_arguments(elements[2:])
          await self.execute_tool(tool_name, args)
        elif command == '/prompts':
          await self.list_prompts()
        elif command == '/immediate':
          if len(elements) < 2:
            print("Utilization: /immediate   ")
            proceed
          
          prompt_name = elements[1]
          args = self._parse_prompt_arguments(elements[2:])
          await self.execute_prompt(prompt_name, args)
        else:
          print(f"Unknown command: {command}")
        proceed
      
      # Course of common queries
      await self.process_query(question)
            
    besides Exception as e:
      print(f"nError in chat loop: {e}")
      traceback.print_exc()

There are a bunch of helper capabilities to parse arguments and return the lists of obtainable instruments and prompts we registered earlier. Because it’s pretty easy, I received’t go into a lot element right here. You may verify the total code in case you are .

As an alternative, let’s dive deeper into how the interactions between the MCP consumer and server work in numerous situations.

When working with sources, we use the self.periods mapping to search out the suitable session (with a fallback possibility if wanted) after which use that session to learn the useful resource.

async def get_resource(self, resource_uri):
  """Retrieve and show content material from an MCP useful resource."""
  session = self.periods.get(resource_uri)
  
  # Fallback: discover any session that handles this useful resource kind
  if not session and resource_uri.startswith("changelog://"):
    session = subsequent(
        (sess for uri, sess in self.periods.gadgets() 
         if uri.startswith("changelog://")), 
        None
    )
      
  if not session:
    print(f"Useful resource '{resource_uri}' not discovered.")
    return

  attempt:
    end result = await session.read_resource(uri=resource_uri)
    if end result and end result.contents:
        print(f"nResource: {resource_uri}")
        print("Content material:")
        print(end result.contents[0].textual content)
    else:
        print("No content material obtainable.")
  besides Exception as e:
    print(f"Error studying useful resource: {e}")
    traceback.print_exc()

To execute a software, we comply with an analogous course of: begin by discovering the session after which use it to name the software, passing its title and arguments.

async def execute_tool(self, tool_name, args):
  """Execute an MCP software straight with given arguments."""
  session = self.periods.get(tool_name)
  if not session:
      print(f"Software '{tool_name}' not discovered.")
      return
  
  attempt:
      end result = await session.call_tool(tool_name, arguments=args)
      print(f"nTool '{tool_name}' end result:")
      print(end result.content material)
  besides Exception as e:
      print(f"Error executing software: {e}")
      traceback.print_exc()

No shock right here. The identical strategy works for executing the immediate.

async def execute_prompt(self, prompt_name, args):
    """Execute an MCP immediate with given arguments and course of the end result."""
    session = self.periods.get(prompt_name)
    if not session:
        print(f"Immediate '{prompt_name}' not discovered.")
        return
    
    attempt:
        end result = await session.get_prompt(prompt_name, arguments=args)
        if end result and end result.messages:
            prompt_content = end result.messages[0].content material
            textual content = self._extract_prompt_text(prompt_content)
            
            print(f"nExecuting immediate '{prompt_name}'...")
            await self.process_query(textual content)
    besides Exception as e:
        print(f"Error executing immediate: {e}")
        traceback.print_exc()

The one main use case we haven’t coated but is dealing with a common, free-form enter from a person (not considered one of particular instructions). 
On this case, we ship the preliminary request to the LLM first, then we parse the output, defining whether or not there are any software calls. If software calls are current, we execute them. In any other case, we exit the infinite loop and return the reply to the person.

async def process_query(self, question):
  """Course of a person question via Anthropic's Claude, dealing with software calls iteratively."""
  messages = [{'role': 'user', 'content': query}]
  
  whereas True:
    response = self.anthropic.messages.create(
        max_tokens=2024,
        mannequin='claude-3-7-sonnet-20250219', 
        instruments=self.available_tools,
        messages=messages
    )
    
    assistant_content = []
    has_tool_use = False
    
    for content material in response.content material:
        if content material.kind == 'textual content':
            print(content material.textual content)
            assistant_content.append(content material)
        elif content material.kind == 'tool_use':
            has_tool_use = True
            assistant_content.append(content material)
            messages.append({'function': 'assistant', 'content material': assistant_content})
            
            # Execute the software name
            session = self.periods.get(content material.title)
            if not session:
                print(f"Software '{content material.title}' not discovered.")
                break
                
            end result = await session.call_tool(content material.title, arguments=content material.enter)
            messages.append({
                "function": "person", 
                "content material": [{
                    "type": "tool_result",
                    "tool_use_id": content.id,
                    "content": result.content
                }]
            })
      
      if not has_tool_use:
          break

So, we now have now totally coated how the MCP chatbot truly works beneath the hood. Now, it’s time to check it in motion. You may run it from the command line interface with the next command. 

python mcp_client_example_base.py

Once you run the chatbot, you’ll first see the next introduction message outlining potential choices:

MCP Chatbot Began!
Instructions:
  stop                           - Exit the chatbot
  @intervals                       - Present obtainable changelog intervals
  @                      - View changelog for particular interval
  /instruments                         - Checklist obtainable instruments
  /software       - Execute a software with arguments
  /prompts                       - Checklist obtainable prompts
  /immediate     - Execute a immediate with arguments

From there, you may check out completely different instructions, for instance, 

  • name the software to checklist the databases obtainable within the DB
  • checklist all obtainable prompts 
  • use the immediate template, calling it like this /immediate sql_query_prompt query=”What number of prospects did we now have in Might 2024?”. 

Lastly, I can end your chat by typing stop.

Question: /software list_databases
[07/02/25 18:27:28] INFO     Processing request of kind CallToolRequest                server.py:619
Software 'list_databases' end result:
[TextContent(type='text', text='INFORMATION_SCHEMAndatasetsndefaultnecommercenecommerce_dbninformation_schemansystemn', annotations=None, meta=None)]

Question: /prompts
Accessible prompts:
- sql_query_prompt: Create a SQL question immediate
  Arguments:
    - query

Question: /immediate sql_query_prompt query="What number of prospects did we now have in Might 2024?"
[07/02/25 18:28:21] INFO     Processing request of kind GetPromptRequest               server.py:619
Executing immediate 'sql_query_prompt'...
I am going to create a SQL question to search out the variety of prospects in Might 2024.
[07/02/25 18:28:25] INFO     Processing request of kind CallToolRequest                server.py:619
Primarily based on the question outcomes, this is the ultimate SQL question:
```sql
choose uniqExact(user_id) as customer_count
from ecommerce.periods
the place toStartOfMonth(action_date) = '2024-05-01'
format TabSeparatedWithNames
```
Question: /software execute_sql_query question="choose uniqExact(user_id) as customer_count from ecommerce.periods the place toStartOfMonth(action_date) = '2024-05-01' format TabSeparatedWithNames"
I am going to enable you to execute this SQL question to get the distinctive buyer rely for Might 2024. Let me run this for you.
[07/02/25 18:30:09] INFO     Processing request of kind CallToolRequest                server.py:619
The question has been executed efficiently. The outcomes present that there have been 246,852 distinctive prospects (distinctive user_ids) in Might 2024 primarily based on the ecommerce.periods desk.

Question: stop

Appears to be like fairly cool! Our fundamental model is working properly! Now, it’s time to take it one step additional and make our chatbot smarter by instructing it to counsel related prompts on the fly primarily based on buyer enter. 

Immediate options

In observe, suggesting immediate templates that finest match the person’s job could be extremely useful. Proper now, customers of our chatbot must both already find out about obtainable prompts or no less than be curious sufficient to discover them on their very own to learn from what we’ve constructed. By including a immediate options function, we will do that discovery for our customers and make our chatbot considerably extra handy and user-friendly.

Let’s brainstorm methods so as to add this performance. I’d strategy this function within the following means:

Consider the relevance of the prompts utilizing the LLM. Iterate via all obtainable immediate templates and, for every one, assess whether or not the immediate is an effective match for the person’s question.

Recommend an identical immediate to the person. If we discovered the related immediate template, share it with the person and ask whether or not they wish to execute it. 

Merge the immediate template with the person enter. If the person accepts, mix the chosen immediate with the unique question. Since immediate templates have placeholders, we’d want the LLM to fill them in. As soon as we’ve merged the immediate template with the person’s question, we’ll have an up to date message able to ship to the LLM.

We’ll add this logic to the process_query perform. Because of our modular design, it’s fairly simple so as to add this enhancement with out disrupting the remainder of the code. 

Let’s begin by implementing a perform to search out probably the most related immediate template. We’ll use the LLM to guage every immediate and assign it a relevance rating from 0 to five. After that, we’ll filter out any prompts with a rating of two or decrease and return solely probably the most related one (the one with the very best relevance rating among the many remaining outcomes).

async def _find_matching_prompt(self, question):
  """Discover a matching immediate for the given question utilizing LLM analysis."""
  if not self.available_prompts:
    return None
  
  # Use LLM to guage immediate relevance
  prompt_scores = []
  
  for immediate in self.available_prompts:
    # Create analysis immediate for the LLM
    evaluation_prompt = f"""
You're an skilled at evaluating whether or not a immediate template is related for a person question.

Person Question: "{question}"

Immediate Template:
- Title: {immediate['name']}
- Description: {immediate['description']}

Fee the relevance of this immediate template for the person question on a scale of 0-5:
- 0: Fully irrelevant
- 1: Barely related
- 2: Considerably related  
- 3: Reasonably related
- 4: Extremely related
- 5: Excellent match

Take into account:
- Does the immediate template handle the person's intent?
- Would utilizing this immediate template present a greater response than a generic question?
- Are the matters and context aligned?

Reply with solely a single quantity (0-5) and no different textual content.
"""
      
    attempt:
      response = self.anthropic.messages.create(
          max_tokens=10,
          mannequin='claude-3-7-sonnet-20250219',
          messages=[{'role': 'user', 'content': evaluation_prompt}]
      )
      
      # Extract the rating from the response
      score_text = response.content material[0].textual content.strip()
      rating = int(score_text)
      
      if rating >= 3:  # Solely contemplate prompts with rating >= 3
          prompt_scores.append((immediate, rating))
            
    besides Exception as e:
        print(f"Error evaluating immediate {immediate['name']}: {e}")
        proceed
  
  # Return the immediate with the very best rating
  if prompt_scores:
      best_prompt, best_score = max(prompt_scores, key=lambda x: x[1])
      return best_prompt
  
  return None

The following perform we have to implement is one that mixes the chosen immediate template with the person enter. We’ll depend on the LLM to intelligently mix them, filling all placeholders as wanted.

async def _combine_prompt_with_query(self, prompt_name, user_query):
  """Use LLM to mix immediate template with person question."""
  # First, get the immediate template content material
  session = self.periods.get(prompt_name)
  if not session:
      print(f"Immediate '{prompt_name}' not discovered.")
      return None
  
  attempt:
      # Discover the immediate definition to get its arguments
      prompt_def = None
      for immediate in self.available_prompts:
          if immediate['name'] == prompt_name:
              prompt_def = immediate
              break
      
      # Put together arguments for the immediate template
      args = {}
      if prompt_def and prompt_def.get('arguments'):
          for arg in prompt_def['arguments']:
              arg_name = arg.title if hasattr(arg, 'title') else arg.get('title', '')
              if arg_name:
                  # Use placeholder format for arguments
                  args[arg_name] = '<' + str(arg_name) + '>'
      
      # Get the immediate template with arguments
      end result = await session.get_prompt(prompt_name, arguments=args)
      if not end result or not end result.messages:
          print(f"Couldn't retrieve immediate template for '{prompt_name}'")
          return None
      
      prompt_content = end result.messages[0].content material
      prompt_text = self._extract_prompt_text(prompt_content)
      
      # Create mixture immediate for the LLM
      combination_prompt = f"""
You're an skilled at combining immediate templates with person queries to create optimized prompts.

Unique Person Question: "{user_query}"

Immediate Template:
{prompt_text}

Your job:
1. Analyze the person's question and the immediate template
2. Mix them intelligently to create a single, coherent immediate
3. Make sure the person's particular query/request is addressed inside the context of the template
4. Preserve the construction and intent of the template whereas incorporating the person's question

Reply with solely the mixed immediate textual content, no explanations or extra textual content.
"""
      
      response = self.anthropic.messages.create(
          max_tokens=2048,
          mannequin='claude-3-7-sonnet-20250219',
          messages=[{'role': 'user', 'content': combination_prompt}]
      )
      
      return response.content material[0].textual content.strip()
      
  besides Exception as e:
      print(f"Error combining immediate with question: {e}")
      return None

Then, we are going to merely replace the process_query logic to verify for matching prompts, ask the person for affirmation and resolve which message to ship to the LLM.

async def process_query(self, question):
  """Course of a person question via Anthropic's Claude, dealing with software calls iteratively."""
  # Verify if there is a matching immediate first
  matching_prompt = await self._find_matching_prompt(question)
  
  if matching_prompt:
    print(f"Discovered matching immediate: {matching_prompt['name']}")
    print(f"Description: {matching_prompt['description']}")
    
    # Ask person in the event that they wish to use the immediate template
    use_prompt = enter("Would you want to make use of this immediate template? (y/n): ").strip().decrease()
    
    if use_prompt == 'y' or use_prompt == 'sure':
        print("Combining immediate template along with your question...")
        
        # Use LLM to mix immediate template with person question
        combined_prompt = await self._combine_prompt_with_query(matching_prompt['name'], question)
        
        if combined_prompt:
            print(f"Mixed immediate created. Processing...")
            # Course of the mixed immediate as a substitute of the unique question
            messages = [{'role': 'user', 'content': combined_prompt}]
        else:
            print("Failed to mix immediate template. Utilizing unique question.")
            messages = [{'role': 'user', 'content': query}]
    else:
        # Use unique question if person does not wish to use the immediate
        messages = [{'role': 'user', 'content': query}]
  else:
    # Course of the unique question if no matching immediate discovered
    messages = [{'role': 'user', 'content': query}]

  # print(messages)
  
  # Course of the ultimate question (both unique or mixed)
  whereas True:
    response = self.anthropic.messages.create(
        max_tokens=2024,
        mannequin='claude-3-7-sonnet-20250219', 
        instruments=self.available_tools,
        messages=messages
    )
    
    assistant_content = []
    has_tool_use = False
    
    for content material in response.content material:
      if content material.kind == 'textual content':
          print(content material.textual content)
          assistant_content.append(content material)
      elif content material.kind == 'tool_use':
          has_tool_use = True
          assistant_content.append(content material)
          messages.append({'function': 'assistant', 'content material': assistant_content})
          
          # Log software name data
          print(f"n[TOOL CALL] Software: {content material.title}")
          print(f"[TOOL CALL] Arguments: {json.dumps(content material.enter, indent=2)}")
          
          # Execute the software name
          session = self.periods.get(content material.title)
          if not session:
              print(f"Software '{content material.title}' not discovered.")
              break
              
          end result = await session.call_tool(content material.title, arguments=content material.enter)
          
          # Log software end result
          print(f"[TOOL RESULT] Software: {content material.title}")
          print(f"[TOOL RESULT] Content material: {end result.content material}")
          
          messages.append({
              "function": "person", 
              "content material": [{
                  "type": "tool_result",
                  "tool_use_id": content.id,
                  "content": result.content
              }]
          })
      
    if not has_tool_use:
        break

Now, let’s take a look at our up to date model with a query about our knowledge. Excitingly, the chatbot was capable of finding the precise immediate and use it to search out the precise reply.

Question: What number of prospects did we now have in Might 2024?
Discovered matching immediate: sql_query_prompt
Description: Create a SQL question immediate
Would you want to make use of this immediate template? (y/n): y
Combining immediate template along with your question...
[07/05/25 14:38:58] INFO     Processing request of kind GetPromptRequest               server.py:619
Mixed immediate created. Processing...
I am going to write a question to rely distinctive prospects who had periods in Might 2024. Since it is a enterprise metric, I am going to exclude fraudulent periods.

[TOOL CALL] Software: execute_sql_query
[TOOL CALL] Arguments: {
  "question": "/* Rely distinct customers with non-fraudulent periods in Might 2024n   Utilizing uniqExact for exact person countn   Filtering for Might 2024 utilizing toStartOfMonth and including date vary */nSELECT n    uniqExactIf(s.user_id, s.is_fraud = 0) AS active_customers_countnFROM ecommerce.periods snWHERE toStartOfMonth(action_date) = toDate('2024-05-01')nFORMAT TabSeparatedWithNames"
}
[07/05/25 14:39:17] INFO     Processing request of kind CallToolRequest                server.py:619
[TOOL RESULT] Software: execute_sql_query
[TOOL RESULT] Content material: [TextContent(type='text', text='active_customers_countn245287n', annotations=None, meta=None)]
The question reveals we had 245,287 distinctive prospects with reputable (non-fraudulent) periods in Might 2024. Here is a breakdown of why I wrote the question this manner:

1. Used uniqExactIf() to get exact rely of distinctive customers whereas excluding fraudulent periods in a single step
2. Used toStartOfMonth() to make sure we seize all days in Might 2024
3. Specified the date format correctly with toDate('2024-05-01')
4. Used TabSeparatedWithNames format as required
5. Supplied a significant column alias

Would you wish to see any variations of this evaluation, equivalent to together with fraudulent periods or breaking down the numbers by nation?

It’s at all times a good suggestion to check unfavorable examples as properly. On this case, the chatbot behaves as anticipated and doesn’t counsel an SQL-related immediate when given an unrelated query.

Question: How are you?
I ought to be aware that I am an AI assistant targeted on serving to you're employed with the obtainable instruments, which embrace executing SQL queries, getting database/desk data, and accessing GitHub PR knowledge. I haven't got a software particularly for responding to non-public questions.

I will help you:
- Question a ClickHouse database
- Checklist databases and describe tables
- Get details about GitHub Pull Requests

What would you wish to find out about these areas?

Now that our chatbot is up and operating, we’re able to wrap issues up.

BONUS: fast and simple MCP consumer with smolagents

We’ve checked out low-level code that permits constructing extremely customised MCP shoppers, however many use circumstances require solely fundamental performance. So, I made a decision to share with you a fast and simple implementation for situations while you want simply the instruments. We’ll use considered one of my favorite agent frameworks — smolagents from HuggingFace (I’ve mentioned this framework intimately in my earlier article).

# wanted imports
from smolagents import CodeAgent, DuckDuckGoSearchTool, LiteLLMModel, VisitWebpageTool, ToolCallingAgent, ToolCollection
from mcp import StdioServerParameters
import json
import os

# setting OpenAI APIKey 
with open('../../config.json') as f:
    config = json.hundreds(f.learn())

os.environ["OPENAI_API_KEY"] = config['OPENAI_API_KEY']

# defining the LLM 
mannequin = LiteLLMModel(
    model_id="openai/gpt-4o-mini",  
    max_tokens=2048
)

# configuration for the MCP server
server_parameters = StdioServerParameters(
    command="uv",
    args=[
        "--directory",
        "/path/to/github/mcp-analyst-toolkit/src/mcp_server",
        "run",
        "server.py"
    ],
    env={"GITHUB_TOKEN": "github_"},
)

# immediate 
CLICKHOUSE_PROMPT_TEMPLATE = """
You're a senior knowledge analyst with greater than 10 years of expertise writing complicated SQL queries, particularly optimized for ClickHouse to reply person questions.

## Database Schema

You're working with an e-commerce analytics database containing the next tables:

### Desk: ecommerce.customers 
**Description:** Buyer data for the net store
**Main Key:** user_id
**Fields:** 
- user_id (Int64) - Distinctive buyer identifier (e.g., 1000004, 3000004)
- nation (String) - Buyer's nation of residence (e.g., "Netherlands", "United Kingdom")
- is_active (Int8) - Buyer standing: 1 = energetic, 0 = inactive
- age (Int32) - Buyer age in full years (e.g., 31, 72)

### Desk: ecommerce.periods 
**Description:** Person session knowledge and transaction information
**Main Key:** session_id
**Overseas Key:** user_id (references ecommerce.customers.user_id)
**Fields:** 
- user_id (Int64) - Buyer identifier linking to customers desk (e.g., 1000004, 3000004)
- session_id (Int64) - Distinctive session identifier (e.g., 106, 1023)
- action_date (Date) - Session begin date (e.g., "2021-01-03", "2024-12-02")
- session_duration (Int32) - Session length in seconds (e.g., 125, 49)
- os (String) - Working system used (e.g., "Home windows", "Android", "iOS", "MacOS")
- browser (String) - Browser used (e.g., "Chrome", "Safari", "Firefox", "Edge")
- is_fraud (Int8) - Fraud indicator: 1 = fraudulent session, 0 = reputable
- income (Float64) - Buy quantity in USD (0.0 for non-purchase periods, >0 for purchases)

## ClickHouse-Particular Tips

1. **Use ClickHouse-optimized capabilities:**
   - uniqExact() for exact distinctive counts
   - uniqExactIf() for conditional distinctive counts
   - quantile() capabilities for percentiles
   - Date capabilities: toStartOfMonth(), toStartOfYear(), in the present day()

2. **Question formatting necessities:**
   - All the time finish queries with "format TabSeparatedWithNames"
   - Use significant column aliases
   - Use correct JOIN syntax when combining tables
   - Wrap date literals in quotes (e.g., '2024-01-01')

3. **Efficiency concerns:**
   - Use acceptable WHERE clauses to filter knowledge
   - Think about using HAVING for post-aggregation filtering
   - Use LIMIT when discovering high/backside outcomes

4. **Knowledge interpretation:**
   - income > 0 signifies a purchase order session
   - income = 0 signifies a searching session with out buy
   - is_fraud = 1 periods ought to sometimes be excluded from enterprise metrics until particularly analyzing fraud

## Response Format
Present solely the SQL question as your reply. Embody transient reasoning in feedback if the question logic is complicated. 

## Examples

**Query:** What number of prospects made buy in December 2024?
**Reply:** choose uniqExact(user_id) as prospects from ecommerce.periods the place toStartOfMonth(action_date) = '2024-12-01' and income > 0 format TabSeparatedWithNames

**Query:** What was the fraud charge in 2023, expressed as a share?
**Reply:** choose 100 * uniqExactIf(user_id, is_fraud = 1) / uniqExact(user_id) as fraud_rate from ecommerce.periods the place toStartOfYear(action_date) = '2023-01-01' format TabSeparatedWithNames

**Query:** What was the share of customers utilizing Home windows yesterday?
**Reply:** choose 100 * uniqExactIf(user_id, os = 'Home windows') / uniqExact(user_id) as windows_share from ecommerce.periods the place action_date = in the present day() - 1 format TabSeparatedWithNames

**Query:** What was the income from Dutch customers aged 55 and older in December 2024?
**Reply:** choose sum(s.income) as total_revenue from ecommerce.periods as s interior be part of ecommerce.customers as u on s.user_id = u.user_id the place u.nation = 'Netherlands' and u.age >= 55 and toStartOfMonth(s.action_date) = '2024-12-01' format TabSeparatedWithNames

**Query:** What are the median and interquartile vary (IQR) of buy income for every nation?
**Reply:** choose nation, median(income) as median_revenue, quantile(0.25)(income) as q25_revenue, quantile(0.75)(income) as q75_revenue from ecommerce.periods as s interior be part of ecommerce.customers as u on u.user_id = s.user_id the place income > 0 group by nation format TabSeparatedWithNames

**Query:** What's the common variety of days between the primary session and the primary buy for customers who made no less than one buy?
**Reply:** choose avg(first_purchase - first_action_date) as avg_days_to_purchase from (choose user_id, min(action_date) as first_action_date, minIf(action_date, income > 0) as first_purchase, max(income) as max_revenue from ecommerce.periods group by user_id) the place max_revenue > 0 format TabSeparatedWithNames

**Query:** What's the variety of periods in December 2024, damaged down by working techniques, together with the totals?
**Reply:** choose os, uniqExact(session_id) as session_count from ecommerce.periods the place toStartOfMonth(action_date) = '2024-12-01' group by os with totals format TabSeparatedWithNames

**Query:** Do we now have prospects who used a number of browsers throughout 2024? If that's the case, please calculate the variety of prospects for every mixture of browsers.
**Reply:** choose browsers, rely(*) as customer_count from (choose user_id, arrayStringConcat(arraySort(groupArray(distinct browser)), ', ') as browsers from ecommerce.periods the place toStartOfYear(action_date) = '2024-01-01' group by user_id) group by browsers order by customer_count desc format TabSeparatedWithNames

**Query:** Which browser has the very best share of fraud customers?
**Reply:** choose browser, 100 * uniqExactIf(user_id, is_fraud = 1) / uniqExact(user_id) as fraud_rate from ecommerce.periods group by browser order by fraud_rate desc restrict 1 format TabSeparatedWithNames

**Query:** Which nation had the very best variety of first-time customers in 2024?
**Reply:** choose nation, rely(distinct user_id) as new_users from (choose user_id, min(action_date) as first_date from ecommerce.periods group by user_id having toStartOfYear(first_date) = '2024-01-01') as t interior be part of ecommerce.customers as u on t.user_id = u.user_id group by nation order by new_users desc restrict 1 format TabSeparatedWithNames

---

**Your Activity:** Utilizing all of the offered data above, write a ClickHouse SQL question to reply the next buyer query: 
{query}
"""

with ToolCollection.from_mcp(server_parameters, trust_remote_code=True) as tool_collection:
  agent = ToolCallingAgent(instruments=[*tool_collection.tools], mannequin=mannequin)
  immediate = CLICKHOUSE_PROMPT_TEMPLATE.format(
      query = 'What number of prospects did we now have in Might 2024?'
  )
  response = agent.run(immediate)

Because of this, we acquired the proper reply.

Picture by writer

In case you don’t want a lot customisation or integration with prompts and sources, this implementation is certainly the best way to go.

Abstract

On this article, we constructed a chatbot that integrates with MCP servers and leverages all the advantages of standardisation to entry instruments, prompts, and sources seamlessly.

We began with a fundamental implementation able to itemizing and accessing MCP capabilities. Then, we enhanced our chatbot with a wise function that means related immediate templates to customers primarily based on their enter. This makes our product extra intuitive and user-friendly, particularly for customers unfamiliar with the entire library of obtainable prompts.

To implement our chatbot, we used comparatively low-level code, providing you with a greater understanding of how the MCP protocol works beneath the hood and what occurs while you use AI instruments like Claude Desktop or Cursor.

As a bonus, we additionally mentioned the smolagents implementation that permits you to rapidly deploy an MCP consumer built-in with instruments.

Thanks for studying. I hope this text was insightful. Keep in mind Einstein’s recommendation: “The vital factor is to not cease questioning. Curiosity has its personal motive for current.” Might your curiosity lead you to your subsequent nice perception.

Reference

This text is impressed by the “MCP: Construct Wealthy-Context AI Apps with Anthropic” brief course from DeepLearning.AI.

Tags: BuildingDataMCPChatbotScienceСustom

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