Similarly, stopping an alarm in another room/on another device doesn’t seem possible without Siri having to ask back about the device/room, and the user having to affirm it. That back and forth takes an unnerving couple of seconds. You can’t just say “Stop the alarm in $room/on $device”. It gets worse when the device you talk to is simultaneously playing back something, because then you first have to stop that playback in order for Siri to not misapply the “stop” command intended for the alarm.