Test FastMCP

Instructions

Implementation Reference

• main.py:18-29 (handler)

  The 'subtract' MCP tool handler implementation. This function is decorated with @mcp.tool which registers it as an MCP tool. It takes two integers (a and b) and returns their difference (a - b).

  @mcp.tool
  def subtract(a: int, b: int) -> int:
      """Subtract the second integer from the first.
      
      Args:
          a: First integer
          b: Second integer
          
      Returns:
          The difference of a and b
      """
      return a - b

• main.py:18-18 (registration)

  The @mcp.tool decorator registers the subtract function as an MCP tool with the FastMCP server instance.

  @mcp.tool

• main.py:19-28 (schema)

  The function signature with type hints (a: int, b: int) -> int and docstring define the input/output schema for the subtract tool, including parameter descriptions and return value documentation.

  def subtract(a: int, b: int) -> int:
      """Subtract the second integer from the first.
      
      Args:
          a: First integer
          b: Second integer
          
      Returns:
          The difference of a and b
      """