ChatCompletionMessage

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ChatCompletionMessage",
  "type": "object",
  "properties": {
    "role": {
      "type": "string",
      "description": "The role of the message author."
    },
    "content": {
      "type": "string",
      "description": "The contents of the message. Can be a string or an array of content parts for multimodal inputs (text and images)."
    },
    "name": {
      "type": "string",
      "description": "An optional name for the participant. Provides the model information to differentiate between participants of the same role."
    },
    "tool_calls": {
      "type": "array",
      "description": "The tool calls generated by the model, such as function calls."
    },
    "tool_call_id": {
      "type": "string",
      "description": "Tool call that this message is responding to. Required for tool role messages."
    }
  }
}