How do I create a new tool?
Use the `create_tool` command in Claude Desktop (or suggest it strongly) to generate a tool dynamically from a natural language description.
@hanweg
基本信息
MCP server that creates its own tools as needed
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"mcp-tool-builder": {
"command": "uv",
"args": [
"venv"
]
}
}
}工具列表暂未提供
当前收录暂时没有可展示的工具列表,不代表服务没有工具。请查阅项目文档了解支持的能力。
工具是从 README 中自动提取的。维护者可以在 ## Tools 标题下列出工具,即可填充这部分内容。
MCP Tool Builder is an MCP server that enables LLMs to dynamically create new tools through MCP clients such as Claude Desktop. It allows users to define new tools using natural language, which are then saved as Python scriptlets and made available after a client restart.
Install by cloning the repository, creating a Python virtual environment, activating it, and running uv pip install -e .. Add the server to claude_desktop_config.json using the uv command pointing to the installation directory. Invoke the create_tool command in Claude Desktop to define a new tool; the client must be restarted before the new tool can be used.
tools.json file.get_bitcoin_price and get_weather_forecast.Use the `create_tool` command in Claude Desktop (or suggest it strongly) to generate a tool dynamically from a natural language description.
The tool is saved as a Python scriptlet in the `tools` subdirectory and its definition is recorded in `tools.json`. You must restart Claude Desktop to see and use the new tool.
Two tools are provided: `get_bitcoin_price` (fetches the current Bitcoin price from CoinGecko) and `get_weather_forecast` (gets a weather forecast for a US ZIP code using geopy).
A Python environment with dependencies installed via `uv` is required. The server is currently labeled as a Windows work-in-progress.
Tools are stored as `.py` files in the `mcp-tool-builder\tools` folder, and their metadata is saved in `mcp-tool-builder\tools\tools.json`.

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