mcp-tool-builder

mcp-tool-builder

20
developer_tools

MCP Tool Builder is an MCP server designed to enable large language models (LLMs) to create new tools dynamically. It integrates with MCP clients like Claude Desktop and allows for natural language-based tool creation. The server also supports saving tools as Python scriptlets and managing their definitions in JSON format.

WORK IN PROGRESS - USE WITH CAUTION - Windows

MCP Tool Builder

An MCP server that empowers LLMs to dynamically create new tools through MCP clients such as Claude Desktop.

mcp-tool-builder MCP server

Features

  • Create new tools by describing them in natural language
    • Requires client restart to use new tools (Claude Desktop)
  • New tools are saved as python scriptlets in ...\mcp-tool-builder\tools
  • New tool definitions are saved in ...\mcp-tool-builder\tools\tools.json

Example tools included at installation

  • get_bitcoin_price: Fetches current Bitcoin price from CoinGecko
  • get_weather_forecast: Gets weather for US ZIP codes (uses geopy)

Creating New Tools

Use the create_tool command in Claude Desktop (or suggest strongly!!) to create new tools dynamically

Installation

  1. Clone this repository
  2. Install dependencies:
cd mcp-tool-builder
uv venv
.venv\Scripts\activate
uv pip install -e .

Usage with Claude Desktop

Add to claude_desktop_config.json:

{
    "mcpServers": {
        "tool-builder": {
            "command": "uv",
            "args": [
                "--directory", 
                "PATH_TO\\mcp-tool-builder",
                "run",
                "tool-builder"
            ]
        }
    }
}

Screenshot 2024-12-24 105318

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