Lots to love here just on a first skim, but I especially adore your three suggested Game Tones and the note that play might not stick to one of them all the time - more evocative and gameable than the average safety tool for sure!
When the initial Neopets TTRPG backlash happened I thought, oh everyone has a vastly different idea of what Neopets IS and the situation would look much differently if expectations were set better