To allow an addon IMC would have to go through it’s code to check what’s it really doing.
It’s easy to say “hey my addon only does this and that”. But in reality it can be doing something else malicious…
They refrain from giving an exact list because they’re not really going to check the code on them one by one. It’s easier to say “if it exploits gameplay, it’s not allowed”.
If they’re really only doing the things the author stated, and those things are non harmful to gameplay (according to common sense), then they are allowed.
That’s probably the reason IMC won’t give a clear statement and you have to take in the addon author’s word, using it at your own risk.

