MCP Multi-Tool Server

A comprehensive Model Context Protocol (MCP) server built with FastMCP that provides calculator tools, document resources, and prompt templates. This server demonstrates multiple MCP capabilities including tools, resources, and prompts in a single implementation.

Features

🧮 Calculator Tools

• Basic Operations: Addition, subtraction, multiplication, division
• Advanced Math: Power, square root, factorial calculations
• Utility Functions: Percentage calculations
• Error Handling: Division by zero protection, negative square root protection, factorial range limits

📖 Document Resources

• TypeScript SDK Resource: Access to MCP TypeScript SDK documentation
• Dynamic File Reading: Reads from configurable file paths
• Error Handling: Graceful handling of missing files

📝 Prompt Templates

• Meeting Summary Template: Executive meeting summary generator
• Variable Substitution: Dynamic template variable replacement
• Structured Output: Professional meeting summary format

Quick Start

Prerequisites

• Python 3.12 or later
• uv package manager

Installation

1. Clone the repository

   git clone <your-repo-url>
   cd mcp-multi-tool-server
   

2. Install dependencies

   uv sync
   

3. Test the server

   uv run mcp dev server.py
   

   Open http://localhost:3000 to test the server in MCP Inspector.

Usage

Calculator Tools

The server provides 8 calculator tools:

Tool	Description	Example
add	Add two numbers	add(5, 3) → 8
subtract	Subtract second from first	subtract(10, 4) → 6
multiply	Multiply two numbers	multiply(6, 7) → 42
divide	Divide first by second	divide(15, 3) → 5
power	Raise to power	power(2, 8) → 256
square_root	Calculate square root	square_root(16) → 4
factorial	Calculate factorial	factorial(5) → 120
calculate_percentage	Calculate percentage	calculate_percentage(200, 15) → 30

TypeScript SDK Resource

Access the TypeScript SDK documentation:

# Resource URI: file://typesdk
# Returns the contents of the TypeScript SDK documentation

Configuration: Update DESKTOP_FILE_PATH in server.py to point to your documentation file:

DESKTOP_FILE_PATH = r"C:\Users\Arnold\Desktop\typesdk.md"

Meeting Summary Prompt

Generate structured meeting summaries:

# Prompt: meeting_summary
# Required parameters:
# - meeting_date: Date of the meeting
# - meeting_title: Title or purpose of the meeting  
# - transcript: Meeting transcript or notes

Output Structure:

• Overview (purpose, participants, topics)
• Key Decisions (major decisions, strategic changes)
• Action Items (next steps, responsibilities, deadlines)
• Follow-up Required (pending discussions, future meetings)

Claude Desktop Integration

Configuration

Add to your Claude Desktop config file:

Windows: %APPDATA%\Claude\claude_desktop_config.json macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "multi-tool-server": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/your/server/directory",
        "run",
        "python",
        "server.py"
      ],
      "env": {
        "UV_PROJECT_ENVIRONMENT": ".venv"
      }
    }
  }
}

Restart Claude Desktop

After updating the configuration, restart Claude Desktop to load the server.

Development

Project Structure

mcp-multi-tool-server/
├── server.py                 # Main server implementation
├── templates/
│   └── Prompt.md             # Meeting summary template
├── pyproject.toml            # Project configuration
├── claude_desktop_config.json # Claude Desktop config example
├── README.md                 # This file
└── .venv/                    # Virtual environment

Testing

MCP Inspector (Recommended)

uv run mcp dev server.py

Direct Server Testing

python server.py

Testing Individual Components

1. Calculator Tools: Use MCP Inspector to call each tool with test parameters
2. Resource Access: Check the resource tab in MCP Inspector for file://typesdk
3. Prompt Templates: Test the meeting_summary prompt with sample data

Customization

Adding New Calculator Tools:

@mcp.tool()
def new_calculation(param1: float, param2: float) -> float:
    """Description of the new calculation."""
    return param1 + param2  # Your calculation logic

Adding New Resources:

@mcp.resource("file://your-resource")
async def get_your_resource() -> str:
    """Description of your resource."""
    # Your resource logic
    return "Resource content"

Adding New Prompts:

@mcp.prompt("your_prompt")
async def your_prompt(param1: str, param2: str) -> str:
    """Description of your prompt."""
    # Your prompt logic
    return f"Processed: {param1}, {param2}"

Error Handling

The server includes comprehensive error handling:

• Division by Zero: Returns appropriate error message
• Negative Square Roots: Prevents invalid operations
• Factorial Limits: Restricts calculations to reasonable ranges (n ≤ 100)
• File Not Found: Graceful handling of missing resource files
• Template Errors: Proper error reporting for prompt template issues

Configuration Options

File Paths

Update these paths in server.py for your environment:

# TypeScript SDK documentation path
DESKTOP_FILE_PATH = r"C:\Users\YourUser\Desktop\typesdk.md"

# Prompt template path (relative to server.py)
PROMPT_TEMPLATE_PATH = os.path.join(os.path.dirname(__file__), "templates", "Prompt.md")

Server Name

Change the server name in server.py:

mcp = FastMCP("Your Server Name")

Troubleshooting

Common Issues

Server won't start:

• Check Python version (3.12+ required)
• Verify uv installation: uv --version
• Check virtual environment: uv sync

Tools not appearing in Claude:

• Verify Claude Desktop config file location
• Check file paths in configuration
• Restart Claude Desktop after config changes

Resource file not found:

• Verify DESKTOP_FILE_PATH points to correct file
• Check file permissions
• Ensure file exists and is readable

Prompt template errors:

• Verify templates/Prompt.md exists
• Check template syntax
• Ensure proper variable placeholders: {{ variable_name }}

Debug Mode

Run with debug output:

uv run python server.py --debug

Contributing

1. Fork the repository
2. Create a feature branch: git checkout -b feature-name
3. Make your changes
4. Add tests for new functionality
5. Submit a pull request

License

This project is licensed under the MIT License. See LICENSE file for details.

Resources

• MCP Documentation
• FastMCP GitHub
• Claude Desktop MCP Setup

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Built with FastMCP - A high-level Python library for building MCP servers.