I’m all for ultra clarity too in these moments
There is another clue which is easy to overlook and may or may not be documented, I had a look but couldn’t find a mention or relevant hit for ‘inverted’
But if you struggle to see a viable SoundPool sound from another, note that when scrolling through those sounds, only the valid ones are inverted (i.e. black text on white rectangle) whereas the ones with an exclamation marker are highlighted by a white frame around the existing white text on black
I understand this was an area subject to review, so it may still change and may find its way (if not already there) into one of @eangman’s peerless documents
For my preferences, it would be so much better if the ineligible sounds were just filtered out or incredibly easy to see as no use here (without even knowing what’s in the manual)
The inverted clue is useful, but it’s so easy to just focus on the text and overlook the ‘highlight’
I agree that ! alone is not a reliable ‘tell’