The MetaData Menu plugin has a way of mapping a tag to a file class – but that’s just the other way around.
This could be done with Templater which has some sort of event hook if I’m not mistaken. So it would be possible to create temporary tags for the duration of queries etc. and remove them again.
If the automatic handling of this is problematic, one could add a hotkey for creating the tags, which of course can be kept on board in YAML as well.
A (somewhat) relevant Templater snippet was talked about here.