OptionalactionOptionalcatalogsExplicit catalogs advertised to and accepted from agents.
OptionalonReceives the auditable outcome of every official client action.
OptionalonApplication-owned implementation for v1.0 agent-initiated function calls.
OptionalonReceives A2UI v1.0 renderer-to-agent action/function/error messages.
Defaults to a deny-all policy; applications must install authority.