Great idea, sadly it did not work very well for my search, "psychedelic spaced out Reggae with plenty of reverb snaps". I thought maybe my phrase was too wacky, so attempt #2 was "Reggae, psychedelic, reverb snaps, toasts". This yielded a playlist with maybe 8 out of 100 songs that I would categorize as Reggae. I hope this feedback can somehow help improve your algorithm!