Update conversation active branch

{
  "type": "object",
  "properties": {
    "conversation_id": {
      "type": "string",
      "format": "uuid",
      "description": "Conversation identifier that scopes the request."
    },
    "message_id": {
      "type": "string",
      "format": "uuid",
      "description": "Provide the message id."
    }
  },
  "required": [
    "conversation_id",
    "message_id"
  ],
  "additionalProperties": false,
  "description": "Input schema for the update_conversation_active_branch tool.",
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Message identifier."
    },
    "conversation_id": {
      "type": "string",
      "description": "Conversation identifier that owns the message."
    },
    "parent_id": {
      "type": [
        "string",
        "null"
      ],
      "description": "Parent message identifier when the message belongs to a branch or reply chain."
    },
    "seq": {
      "type": "number",
      "description": "Monotonic sequence number within the conversation."
    },
    "role": {
      "type": "string",
      "description": "Message role such as user, assistant, tool, or system."
    },
    "created_by": {
      "type": [
        "string",
        "null"
      ],
      "description": "User or actor identifier that created the message."
    },
    "parts": {
      "type": "array",
      "items": {
        "description": "One part item associated with this record."
      },
      "description": "Structured message parts, including text, tool invocations, or rich content blocks."
    },
    "model": {
      "type": [
        "string",
        "null"
      ],
      "description": "Model identifier that generated the message, when applicable."
    },
    "token_usage": {
      "anyOf": [
        {
          "description": "The token usage associated with this record."
        },
        {
          "type": "null",
          "description": "The token usage returned by the tool."
        }
      ],
      "description": "Token accounting metadata associated with the message."
    },
    "finish_reason": {
      "type": [
        "string",
        "null"
      ],
      "description": "Completion finish reason for model-generated messages."
    },
    "cost_credits": {
      "type": [
        "string",
        "null"
      ],
      "description": "Credit cost attributed to the message, when tracked."
    },
    "status": {
      "type": "string",
      "description": "Lifecycle status of the message."
    },
    "edited_at": {
      "type": [
        "string",
        "null"
      ],
      "description": "Timestamp when the message was edited, or null when unedited."
    },
    "idempotency_key": {
      "type": [
        "string",
        "null"
      ],
      "description": "Idempotency key used to deduplicate message creation requests."
    },
    "metadata": {
      "anyOf": [
        {
          "type": "object",
          "additionalProperties": {
            "description": "Additional structured values associated with this result."
          },
          "description": "Additional structured metadata for the record."
        },
        {
          "type": "null",
          "description": "Additional structured metadata returned by the tool."
        }
      ],
      "description": "Additional machine-readable message metadata."
    },
    "created_at": {
      "type": "string",
      "description": "Timestamp when the message was created."
    },
    "updated_at": {
      "type": [
        "string",
        "null"
      ],
      "description": "Timestamp when the message was last updated."
    }
  },
  "required": [
    "id",
    "conversation_id",
    "parent_id",
    "seq",
    "role",
    "created_by",
    "parts",
    "model",
    "finish_reason",
    "cost_credits",
    "status",
    "edited_at",
    "idempotency_key",
    "metadata",
    "created_at",
    "updated_at"
  ],
  "additionalProperties": false,
  "description": "Conversation message record returned by MCP conversation tools.",
  "$schema": "http://json-schema.org/draft-07/schema#"
}