Overzealous (adjective)
Too zealous; too enthusiastic or fervent.
“With his overzealous attempts to impress, he only managed to annoy her.”
Zealous (adjective)
Full of zeal; ardent, fervent; exhibiting enthusiasm or strong passion.
Wiktionary
Overzealous (adjective)
too zealous in one’s attitude or behaviour
“he’s been overzealous in handing out parking tickets”
Zealous (adjective)
having or showing zeal
“the council was extremely zealous in the application of the regulations”
Oxford Dictionary