@NixenSya yea, those tags you mentioned (ninja and gyaru), I find are weirdly specific. Tho I stopped really thinking about tags much when manga like
this got tagged as Gender Bender when it was one scene so far. Well at least my opinion is known.
I will reiterate that I like tags that you use in conjunction with other tags to find something like the combination, as others have stated, just because it's tagged villainess, doesn't exactly mean the protag is the villainess, but then we have manga like
this that uses the tropes of "the villainess", where a villainess is misunderstood as bad, has villainess in the title, but the protag isn't female (well maybe, there are two protags, but I consider the lead to be Prince guy) and all that. If it was like "villainess lead" or smt, i'd be less worried, but then that sounds too specific, since the tags like Gyaru are just added if those are present (not exactly if they are important to the story, but nuances, blah blah.
TL
R I like using combos (if possible) rather than specific tags, and the current suggestion is a bit too vague (as stated by others) and also there is a villainess manga without a female lead, so I was wrong (lol?)