ReadonlyavailableReadonlycapabilitiesReadonlycapabilityReadonlylifecycleWhether an explicitly advertised action is currently available.
Optionaloptions: HostActionOptionsOptionalpayload: JsonValueOptionaloptions: HostActionOptionsOptionaloptions: OpenWindowOptionsOptionalactionOptions: HostActionOptionsAsk the authenticated host to advertise supported actions. Invalid responses reject.
Optionaloptions: HostActionOptionsPersist a setting and resolve only after the host confirms the saved settings.
Optionaloptions: HostActionOptionsOptionaloptions: SubscriptionOptions
Discovery state; actions require an explicit advertised capability.