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