Returned when the model-generated function call arguments are updated.
| Name | Type | Description | Notes |
|---|---|---|---|
| eventId | String | The unique ID of the server event. | |
| type | String | The event type, must be "response.function_call_arguments.delta". | |
| responseId | String | The ID of the response. | |
| itemId | String | The ID of the function call item. | |
| outputIndex | Integer | The index of the output item in the response. | |
| callId | String | The ID of the function call. | |
| delta | String | The arguments delta as a JSON string. |