Right now, Expression Macros will properly expand within Trigger Actions > Operations > Subject / Message field, as well as within a Trigger Event Name.

We would also like the ability to expand Expression Macro’s in the Trigger Description, as we would prefer to use one standard Trigger Action Message template for all alerts, so we can keep a similar email format with all teams but still include team specific requests in the Trigger Description (we use

{TRIGGER.DESCRIPTION}

in the Trigger Actions > Operations > Message field)