get_weather

Instructions

参数：
    city: 城市名称（英文），如 Beijing、Tokyo、London

Implementation Reference

• server.py:26-56 (handler)

  The get_weather handler function registered as an MCP tool via @mcp.tool(). It fetches current weather from wttr.in API for a given city and returns temperature, humidity, feels-like, description, and wind speed.

  @mcp.tool()
  async def get_weather(city: str) -> dict:
      """获取指定城市的当前天气信息。
  
      参数：
          city: 城市名称（英文），如 Beijing、Tokyo、London
      """
      import httpx
  
      try:
          async with httpx.AsyncClient() as client:
              resp = await client.get(
                  f"https://wttr.in/{city}?format=j1",
                  timeout=10,
              )
              resp.raise_for_status()
              data = resp.json()
              current = data["current_condition"][0]
  
              return {
                  "city": city,
                  "temperature_celsius": current["temp_C"],
                  "humidity_percent": current["humidity"],
                  "feels_like_celsius": current["FeelsLikeC"],
                  "description": current["weatherDesc"][0]["value"],
                  "wind_speed_kmh": current["windspeedKmph"],
              }
      except httpx.TimeoutException:
          return {"error": f"查询 {city} 超时，请稍后重试"}
      except Exception as e:
          return {"error": f"查询失败: {str(e)}"}

• server.py:26-27 (registration)

  Registration of get_weather as an MCP tool using the @mcp.tool() decorator on the FastMCP server instance.

  @mcp.tool()
  async def get_weather(city: str) -> dict:

• server.py:26-32 (schema)

  Input schema for get_weather: parameter 'city' (str) with docstring describing the expected format. Output type is dict as per return type annotation.

  @mcp.tool()
  async def get_weather(city: str) -> dict:
      """获取指定城市的当前天气信息。
  
      参数：
          city: 城市名称（英文），如 Beijing、Tokyo、London
      """

• server_remote.py:29-57 (handler)

  Duplicate handler for get_weather in the Streamable HTTP remote server version (server_remote.py). Same logic as server.py version.

  @mcp.tool()
  async def get_weather(city: str) -> dict:
      """获取指定城市的当前天气信息。
  
      参数：
          city: 城市名称（英文），如 Beijing、Tokyo、London
      """
      try:
          async with httpx.AsyncClient() as client:
              resp = await client.get(
                  f"https://wttr.in/{city}?format=j1",
                  timeout=10,
              )
              resp.raise_for_status()
              data = resp.json()
              current = data["current_condition"][0]
  
              return {
                  "city": city,
                  "temperature_celsius": current["temp_C"],
                  "humidity_percent": current["humidity"],
                  "feels_like_celsius": current["FeelsLikeC"],
                  "description": current["weatherDesc"][0]["value"],
                  "wind_speed_kmh": current["windspeedKmph"],
              }
      except httpx.TimeoutException:
          return {"error": f"查询 {city} 超时，请稍后重试"}
      except Exception as e:
          return {"error": f"查询失败: {str(e)}"}