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
基本情報
MCP server that creates its own tools as needed
以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。
{
"mcpServers": {
"mcp-tool-builder": {
"command": "uv",
"args": [
"venv"
]
}
}
}ツール一覧はまだありません
この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。
ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。
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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