The key of the currently-active element instance for this agent instance. Used for ownership/equality validation against the stored agent instance and, when the supplied key differs from the previous association (re-entry of an ad-hoc sub-process or AI Agent task), appended to elementInstanceKeys with the reverse link updated on the supplied element instance.
OptionalmetricsMetric increments to apply to the aggregate counters.
OptionalstatusThe new status of the agent instance.
OptionaltoolsThe complete list of tools available to the agent, replacing any previously stored tools. When provided, the engine replaces the existing tool list with this value.
Request to update the mutable state of an agent instance.