Triggers, when used as defining fail cases, tend to have a confusing effect on sysadmins.

When they receive a message stating "Trigger X: ON" , where 'X' stands for "Temperature too high", it isn't always as easy to understand.

Introduce a system where you can define a 'positive' or 'negative' template-based message.
Also, re-use this message system for use in external scripts.