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modelcontextprotocol--pytho…/docs_src/extensions/tutorial005.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

35 lines
834 B
Python

import logging
from typing import Any
from mcp_types import CallToolRequestParams
from mcp.server.context import CallNext, HandlerResult, ServerRequestContext
from mcp.server.extension import Extension
from mcp.server.mcpserver import MCPServer
logger = logging.getLogger(__name__)
class AuditLog(Extension):
"""Observe every tools/call without touching its result."""
identifier = "com.example/audit"
async def intercept_tool_call(
self,
params: CallToolRequestParams,
ctx: ServerRequestContext[Any, Any],
call_next: CallNext,
) -> HandlerResult:
logger.info("tool %r called", params.name)
return await call_next(ctx)
mcp = MCPServer("audited", extensions=[AuditLog()])
@mcp.tool()
def add(a: int, b: int) -> int:
"""Add two numbers."""
return a + b