debian apt: how to leverage on "Tags" for filtering

hello all,

I do lots of things with embedded PCs, onto which I often install 
Debian.
Important: these machines have no Video/Gfx peripherals whatsoever, they 
only get used via serial console (or maybe SSH).

Can someone please point me toward documentation which explains how to 
make use of the TAGs that packages have when installing more SW by means 
of apt ?

My goal (dream of...) is to be able to constrict apt to NEVER install 
GUI stuff of any kind (no X11, no DEs etc.)

By reading output of apt show I got aware of Tags like 
"interface::graphical", "interface::X11", "uitoolkit::qt", 
"x11::application" and the like.
So there MUST be a way to use them, ins't it?

Alas I'm having a hard time finding appropriate user-docs/tutorial via 
big goo or the duck.

Thanks in advance for any hint!


NB: I see here no suitable category/subforum for my topic so please 
pardon my odd insertion...