How does Shakespeare show the reader that Puck is mischievous but not evil?

Puck shows that he is mischievous but not evil for many reasons. Firstly he enjoys pranks and jokes, but does not inflict actual harm on the characters (he does not physically harm them or their loved ones). He causes trouble in a playful manner, not a demeaning hateful manner. He causes a lot of issues and twists and turns however does not cause war, strife or pain to the characters.

I guess because he doesn't call him evil.