ID of the calling node
Unique ID of this call; matches the finished event
Identifier of the Agent being called
Display title; may be omitted
Start time, Unix timestamp in seconds
Call arguments as a JSON string
Localized display name
Progress text; may be omitted
Short tags; may be omitted
true if called during the thinking phase
Payload of an
agent_tool_startedstream event. When the Agent delegates to another Agent as a tool, that inner run is reported with theagentTool*family — the shape mirrors the subagent events.