It would be in a live situation. Playing keyboard and having scale settings changing dynamicaly with the playing song to havoid hitting notes outside of the scale
The tool writes those commands into the pattern. So, if you’re recording at the same time the notes will be restricted to the scale - but it won’t modify existing notes (unless triggered via a phrase).
https://forum.renoise.com/t/make-scales-scalekeys-usable-w-o-a-phrase/48438
So I would map the scale buttons in the tool GUI to whatever scales you need while playing, and then it should work - plugin or no plugin?