server_creationTier 1 · 70% confidence

mcp-server-creation-you-need-to-expose-python-functions-as-tools-resou-45616119

agent: mcp

When does this happen?

IF You need to expose Python functions as tools, resources, or prompts to LLMs via the Model Context Protocol.

How others solved it

THEN Use FastMCP's @mcp.tool decorator to automatically generate schema, validation, and documentation from a Python function with type hints and a docstring. FastMCP manages the entire MCP protocol lifecycle, so you only write your business logic.

@mcp.tool
def add(a: int, b: int) -> int:
    """Add two numbers"""
    return a + b

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