We'd like to be able to link some free text data with an alert configuration.

One use case: we forward open Ops Manager alerts to other monitoring systems of our company (using the API). Those monitoring systems need some specific data that should be associated with the forwarded alert.

Another use case: we have a Python script/lib that provision alerts in several projects.
Having a free field could be used to link source code definition with the published alert in Ops Manager and make a cleaner publishing script (currently it consists in delete all / publish all alerts which is not ideal).