Multimodal Live API Returns Executable Code Instead of Expected Function Call Response

Gemini API
1

Unable to Make Function Calling Work with Multimodal Live API

Current Issue

I am unable to get function calling to work with the multimodal live API. The API keeps returning executable code and attempting to execute it, as shown in this response format:

{
  "modelTurn": {
    "parts": [
      {
        "executableCode": {
          "language": "PYTHON",
          "code": "..." // code
        }
      }
    ]
  }
}

Configuration Code

Function Declaration

add_item = FunctionDeclaration(
    name="add_item",
    description="Add an item to the inventory list. Takes a complete item object containing all required fields.",
    parameters={
        "type": "OBJECT",
        "properties": {
            "item": {
                "type": "OBJECT",
                "description": "Complete item information",
                "properties": {
                    "Item": {
                        "type": "STRING",
                        "description": "Name of the detected item",
                    },
                    "Make": {
                        "type": "STRING",
                        "description": "Manufacturer name or NA",
                    },
                    "Model": {
                        "type": "STRING",
                        "description": "Model identifier or NA",
                    },
                    "Year": {
                        "type": "STRING",
                        "description": "Manufacturing year or NA",
                    },
                    "Serial_Number": {
                        "type": "STRING",
                        "description": "Unique identifier or NA",
                    },
                    "Description": {
                        "type": "STRING",
                        "description": "Includes cleanliness assessment, color and other general details",
                    },
                    "Approximate_price": {
                        "type": "STRING",
                        "description": "Web-searched current market value (with currency symbol)",
                    },
                    "where_was_this_detected": {
                        "type": "STRING",
                        "description": "Location + timestamp in HH:MM:ss format",
                    },
                    "questions": {
                        "type": "STRING",
                        "description": "Missing or uncertain information, price variations, or 'None'",
                    },
                },
                "required": [
                    "Item",
                    "Make",
                    "Model",
                    "Year",
                    "Serial_Number",
                    "Description",
                    "Approximate_price",
                    "where_was_this_detected",
                    "questions",
                ],
            }
        },
        "required": ["item"],
    },
)

Tool Configuration

add_item_tool = Tool(function_declarations=[add_item])

Live API Connection Configuration

live_connect_config = LiveConnectConfig(
    response_modalities=["TEXT"],
    tools=[add_item_tool],
    system_instruction=Content(parts=[{"text": SYSTEM_INSTRUCTION}]),
)