Creating Tools with @mcp.tool
Tools are functions that AI can call. The @mcp.tool decorator registers your function with the MCP server.
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LearnStep 1 of 4
The @mcp.tool Decorator
Learning Objectives
- •Create basic tools
- •Use type hints effectively
- •Write helpful docstrings
Lesson Outline
LearnStep 1/4
The @mcp.tool Decorator
python
Anatomy of a Tool
- @mcp.tool: Registers the function
- Function name: Becomes the tool name
- Parameters: Become tool inputs (with types!)
- Docstring: Becomes the tool description
- Return type: Defines what the tool returns
Decorator Options
python