# ResponseMcpCallArgumentsDoneEvent
## Properties
**r#type** | **String** | The type of the event. Always 'response.mcp_call_arguments.done'. |
**output_index** | **i32** | The index of the output item in the response's output array. |
**item_id** | **String** | The unique identifier of the MCP tool call item being processed. |
**arguments** | **String** | A JSON string containing the finalized arguments for the MCP tool call. |
**sequence_number** | **i32** | The sequence number of this event. |
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