Trigger Operational Data: Different Item Than Trigger Expression

[todd_mm]

Zabbix 4.4

I'd like to include the last value of a few other host items as operational data in a trigger.
Based on the trigger doc (and Macro doc) and other info I consulted, I expected something like this would work:

[{{HOST.HOST}:mykey1.last(#1)}] {{HOST.HOST}:mykey2.last(#1)}: {{HOST.HOST}:mykey3.last(#1)}

The resultant trigger message expands {HOST:HOST} just fine, but it doesn't expand what I'm hoping to be the last value of that key for that host.

• The item is defined in a template that the host is linked to.
• The trigger isn't looking at any of these item keys. It's looking at some other item defined in the template.
• mykey1 is something like test.scenario.name

How am I supposed to refer to an item for a host in the trigger?

[jmrice]

Did you ever find a solution for this? I am trying to do something similar ...
I want to reference operational data from a different item than the trigger event.

Issuer: {{HOST.HOST}:system.run[/usr/local/bin/checkissuer.sh {EVENT.TAGS.domain} 443].last()}

{HOST.HOST} expands, and the {EVENT.TAGS.domain} returns the appropriate TAG, but when the message arrives,
all I receive is:

Issuer: *UNKNOWN*

The docs say that the expression is invalid. What am I missing?