Update app.py

app.py

@@ -47,8 +47,8 @@ class PDOKLocationInfo(BaseModel):
     centroide_rd: str
 
 @tool
-def pdok_location_info(postal_code: Optional[str] = None, house_number: Optional[str] = None, street_name: Optional[str] = None, city: Optional[str] = None) -> Union[PDOKLocationInfo, str]:
-    """Provides information about a Dutch address or postal code. The combinations of postalcode and housenumber are vallid input or streetname, housenumber and city. Don't attempt to fill fields if you missing input, ask the user.
+def pdok_location_info(postal_code: Optional[str] = None, house_number: Optional[str] = None, street_name: Optional[str] = None, city: Optional[str] = None) -> str:
+    """Provides information about a Dutch address or postal code.
     
     Args:
         postal_code: Postal code in the format '1234 AA'.
@@ -57,8 +57,7 @@ def pdok_location_info(postal_code: Optional[str] = None, house_number: Optional
         city: Name of the city.
 
     Returns:
-        Union[PDOKLocationInfo, str]: Either a PDOKLocationInfo object containing the location information,
-        or a string containing error and debug information if something goes wrong.
+        str: JSON string containing the location information or error message with debug info.
     """
     
     debug_info = []
@@ -116,13 +115,15 @@ def pdok_location_info(postal_code: Optional[str] = None, house_number: Optional
 
         first_result = docs[0]
         location_info = PDOKLocationInfo(**first_result)
-        return location_info
+        # Convert the PDOKLocationInfo object to a JSON string
+        return location_info.model_dump_json()
     
     except requests.exceptions.RequestException as e:
         return f"Error during API request: {e}\nDebug info:\n" + "\n".join(debug_info)
     except (ValueError, KeyError) as e:
         return f"Error processing API response: {e}\nDebug info:\n" + "\n".join(debug_info)
 
+
 @tool
 def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool