If that is the definition of perfection, it is a vague definition. You are positing an implication of perfection— something your definition of perfection implies. You're not actually defining it. But that's ok. I don't know that I can define perfection, either, except by THE standard—God himself. Since obviously creatures can't be perfect if they have to be God, then it is referring to lack of something that makes one imperfect, and that would most easily fit, sin. After all, let's say God made them with a tail and fur like an extra intelligent chimp, except, lacking the tail. Would that lack of a tail make them imperfect? What if one arm was built much longer and stronger than the other. Would that be an imperfection?
But my whole point was in the use of the word, "perfection", to describe them. Who said they were perfect? What I read is, "very good". But either way, it seems plain that they were made uncorrupted, as one reads further into the story. And that's the point of the story. Everything we add is speculation, unless it's something Scripture adds, either directly or through reason.
—Oh sorry, "the purpose to which God intended them", is, among many other things, the enslaving of all mankind to sin and thus the need for Redemption.