get_metadata

Instructions

Implementation Reference

• src/street_view_mcp/server.py:88-126 (handler)

  Handler function for 'get_metadata' tool. Includes @mcp.tool() decorator for registration and input parsing. Delegates core logic to get_panorama_metadata helper.

  @mcp.tool()
  def get_metadata(
      location: Optional[str] = None,
      lat_lng: Optional[str] = None,
      pano_id: Optional[str] = None,
      radius: int = 50,
      source: str = "default",
  ) -> Dict[str, Any]:
      """
      Fetch metadata about a Street View panorama.
      
      Args:
          location: The address to check for Street View imagery
          lat_lng: Comma-separated latitude and longitude (e.g., "40.748817,-73.985428")
          pano_id: Specific panorama ID to fetch metadata for
          radius: Search radius in meters when using location or coordinates
          source: Limit Street View searches to selected sources ("default" or "outdoor")
          
      Returns:
          Dict: Panorama metadata including status, copyright, date, pano_id, lat, lng
      """
      # Parse lat_lng string to tuple if provided
      lat_lng_tuple = None
      if lat_lng:
          try:
              lat, lng = map(float, lat_lng.split(','))
              lat_lng_tuple = (lat, lng)
          except (ValueError, TypeError):
              raise ValueError("Invalid lat_lng format. Use format: '40.714728,-73.998672'")
      
      # Fetch metadata
      return get_panorama_metadata(
          location=location,
          lat_lng=lat_lng_tuple,
          pano_id=pano_id,
          radius=radius,
          source=source,
      )

• src/street_view_mcp/street_view.py:115-171 (helper)

  Core implementation of get_metadata logic. Makes HTTP request to Google Street View Metadata API and returns JSON response.

  def get_panorama_metadata(
      location: Optional[str] = None,
      lat_lng: Optional[Tuple[float, float]] = None,
      pano_id: Optional[str] = None,
      radius: int = 50,
      source: str = "default",
  ):
      """
      Fetch metadata about a Street View panorama to check availability.
      
      Args:
          location (str, optional): The address to check for Street View imagery
          lat_lng (tuple, optional): Latitude and longitude coordinates as (lat, lng)
          pano_id (str, optional): Specific panorama ID to fetch metadata for
          radius (int): Search radius in meters (when using location or lat_lng)
          source (str): Limits Street View searches to selected sources (default, outdoor)
          
      Returns:
          dict: Panorama metadata including status, copyright, date, pano_id, lat, lng
          
      Raises:
          ValueError: If no location method is provided or multiple are provided
          Exception: If the API request fails
      """
      # Validate input: exactly one location method must be provided
      location_methods = sum(1 for m in [location, lat_lng, pano_id] if m is not None)
      if location_methods == 0:
          raise ValueError("Must provide one of: location, lat_lng, or pano_id")
      if location_methods > 1:
          raise ValueError("Provide only one of: location, lat_lng, or pano_id")
      
      base_url = "https://maps.googleapis.com/maps/api/streetview/metadata"
      
      params = {
          "radius": radius,
          "source": source,
          "key": API_KEY,
      }
      
      # Set the location parameter based on what was provided
      if location:
          params["location"] = location
      elif lat_lng:
          params["location"] = f"{lat_lng[0]},{lat_lng[1]}"
      elif pano_id:
          params["pano"] = pano_id
          # Remove radius when using pano_id as it's not applicable
          if "radius" in params:
              del params["radius"]
      
      response = requests.get(base_url, params=params)
      
      if response.status_code == 200:
          return response.json()
      else:
          raise Exception(f"Error fetching Street View metadata: {response.status_code}")