List Call Messages

The message's role.

The message text for user and agent messages, tool arguments for tool_call messages, tool results for tool_result messages.

The invocation ID for tool messages. Used to pair tool calls with their results.

The tool name for tool messages.

For failed tool calls, additional debugging information. While the text field is presented to the model so it can respond to failures gracefully, the full details are only exposed via the Ultravox REST API.

The medium of the message.

The index of the message within the call stage.

The call stage this message appeared in.