Generation of mouse clicks?

I would like to ask if it is allowed the number of mouse clicks on certain devices on the mouse

Artificially uplift. If you set the mouse so that you can hit with the easyshift button both in the left and the right mouse button in Minecraft. Another shot gives you one click, twice as many clicks, making it easy to get 25-30 clicks, which can be beneficial to other players. For example, one has the advantage of little or no recoil in MLG rush, bedwars, etc. The question is: Is this allowed or can it be banned?

The second question is what legitimity means. And the third. Is the legit what my buddy is doing or is he just bad to make the clicks himself.

I would look forward to the fastest possible answer.

Any kind of manipulation, be it through software or hardware technically, eg. Pinching keys is not compatible with the rules of the big servers because it gives you an edge over others.

Legit means in practice that you're just playing fair. Translated legitimate means that you play according to the rules.