Interface: ToolExecutionEndEvent

Payload emitted on the observability bus when a tool's executor finishes (successfully or not).

Remarks

Fired after the handler returns or throws. When isError is true, the handler threw and the error has been wrapped in @nhtio/adk!E_TOOL_DOWNSTREAM_ERROR. Fires for both @nhtio/adk!Tool and @nhtio/adk!ArtifactTool invocations — the payload is identical.

Properties

Property	Type	Description
callId	string	Correlates with the associated ToolCall id, if known. Empty string when not provided.
durationMs	number	Duration of the execution in milliseconds.
endedAt	DateTime	When execution ended.
isError	boolean	true when the handler threw an error; the rejection reason is @nhtio/adk!E_TOOL_DOWNSTREAM_ERROR.
startedAt	DateTime	When execution started.
toolName	string	Name of the tool that was executed.
turnId	string	ID of the turn in which the tool was executed.