FastMCP

import pytest from mcp.server.fastmcp import FastMCP pytestmark = pytest.mark.anyio async def test_list_tools_returns_all_tools(): mcp = FastMCP("TestTools") # Create 100 tools with unique names num_tools = 100 for i in range(num_tools): @mcp.tool(name=f"tool_{i}") def dummy_tool_func(): f"""Tool number {i}""" return i globals()[f"dummy_tool_{i}"] = ( dummy_tool_func # Keep reference to avoid garbage collection ) # Get all tools tools = await mcp.list_tools() # Verify we get all tools assert len(tools) == num_tools, f"Expected {num_tools} tools, but got {len(tools)}" # Verify each tool is unique and has the correct name tool_names = [tool.name for tool in tools] expected_names = [f"tool_{i}" for i in range(num_tools)] assert sorted(tool_names) == sorted( expected_names ), "Tool names don't match expected names"