GIS MCP Server

Instructions

Implementation Reference

• src/gis_mcp/shapely_functions.py:437-450 (handler)

  The handler function for the 'is_valid' MCP tool. It parses WKT geometry using Shapely, checks if it is valid with geom.is_valid, and returns a dictionary containing the validation status.

  @gis_mcp.tool()
  def is_valid(geometry: str) -> Dict[str, Any]:
      """Check if a geometry is valid."""
      try:
          from shapely import wkt
          geom = wkt.loads(geometry)
          return {
              "status": "success",
              "is_valid": bool(geom.is_valid),
              "message": "Geometry validation completed successfully"
          }
      except Exception as e:
          logger.error(f"Error validating geometry: {str(e)}")
          raise ValueError(f"Failed to validate geometry: {str(e)}")

• src/gis_mcp/shapely_functions.py:437-437 (registration)

  The @gis_mcp.tool() decorator registers the is_valid function as an MCP tool.

  @gis_mcp.tool()

• src/gis_mcp/shapely_functions.py:71-80 (helper)

  Resource listing that includes 'is_valid' among available validation operations.

  @gis_mcp.resource("gis://operations/validation")
  def get_validation_operations() -> Dict[str, List[str]]:
      """List available validation operations."""
      return {
          "operations": [
              "is_valid",
              "make_valid",
              "simplify"
          ]
      }