I'd like to leverage the frontend scripts (https://www.zabbix.com/documentation/2.2/manual/web_interface/frontend_sections/administration/scripts) to perform more complex actions, which could be, for example, based on the triggerid/itemid. Currently just a handful of macros are exposed:

{HOST.CONN}, {HOST.IP}, {HOST.DNS}, {HOST.HOST}, {HOST.NAME}

By exposing the {EVENT.ID} macro, it would be possible to script something that would gather the triggerid/itemid and act upon those.