MCP Feedback Collector

Instructions

Implementation Reference

• src/mcp_feedforward/server.py:443-479 (handler)

  The handler function for the 'pick_image' tool. It is decorated with @mcp.tool() which also serves as registration. Opens a tkinter file dialog to let user pick an image file, encodes it to base64, and returns an MCPImage object.

  @mcp.tool()
  def pick_image() -> MCPImage:
      """
      弹出图片选择对话框，让用户选择图片文件或从剪贴板粘贴图片。
      用户可以选择本地图片文件，或者先截图到剪贴板然后粘贴。
      """
      root = tk.Tk()
      root.withdraw()  # 隐藏主窗口
      
      file_types = [
          ("图片文件", "*.png *.jpg *.jpeg *.gif *.bmp *.webp"),
          ("PNG files", "*.png"),
          ("JPEG files", "*.jpg *.jpeg"),
          ("所有文件", "*.*")
      ]
      
      file_path = filedialog.askopenfilename(
          title="选择图片文件",
          filetypes=file_types
      )
      
      root.destroy()
      
      if file_path:
          try:
              with open(file_path, "rb") as f:
                  image_data = f.read()
                  image_base64 = base64.b64encode(image_data).decode('utf-8')
                  
                  return MCPImage(
                      data=image_base64,
                      media_type="image/png"
                  )
          except Exception as e:
              raise Exception(f"读取图片失败: {str(e)}")
      else:
          raise Exception("未选择图片文件")