Example

{
    "event_id": "event_5354",
    "type": "response.function_call_arguments.delta",
    "response_id": "resp_002",
    "item_id": "fc_001",
    "output_index": 0,
    "call_id": "call_001",
    "delta": "{\"location\": \"San\""
}

response.function_call_arguments.done

Returned when the model-generated function call arguments are done streaming. Also emitted when a Response is interrupted, incomplete, or cancelled.