The approach I mentioned in my previous reply could work for that. Instead of controlling the device or alarm directly, you would have a rule perform the action, then add the rule to the dashboard instead of the device/alarm.
In this example, I don’t have anything in the Triggers section since the rule will only be executed manually from a dashboard. Then I would just add this rule to my dashboard as a tile and anytime it is tapped, it would perform the Disarm action and send the notification with who tapped the tile.
As a reminder, you can execute a rule from Super Tiles natively.
Or in any tile which supports the hyperlink action, you can use the special $.runRule() hyperlink syntax.