Question about tags in "series" library

[flymetothemoon]

Hey there!

I couldn't find info about this so I would like to ask about it.

Can you add tags to the folder name of a series? Instead of putting a tag inside the file of each episode or the .nfo file.

For example if I have "Stranger Things (2016)" folder with no .nfo file and no tags metadata inside each file of each episode...
Can you add a tag to the series by putting something in the folder name? For example if I rename it to "Stranger Things (2016) (mystery)" or  "Stranger Things (2016) [mystery]" or  "Stranger Things (2016) {mystery}" etc.

Is something like this possible? Or something similar? To be able to easily apply a tag and keep track of what you have inside Jellyfin by filtering by a certain tag.

[jellykrabbypatty]

I don't see how you would directly in the item folder without a .NFO file or editing a file deep in the Jellyfin cache/config wherever the tags are located.

EDIT: Or using like an SQL metadata manager with a GUI but I think I tried that before and Jellyfin wouldn't allow me to make any edits. It was more trouble than it was worth.

[flymetothemoon]

So I guess the only easy way to have tag for series is to use something like mkvtoolnix to add custom tag to each file for each episode?