MacBook Dent

I would not accept any guarantee that there is no other damage, except for one from the Genius Bar after they examine it.

That being said, MBPs are battle-tanks compared to most PCs that are little better than hard plastic shell. If you want to be sure (at least closer to it) talk to Genius Bar. AppleCare+ does have 2 incidents of partial coverage (not free, though).

Id reach out to a Support Advisor for this one.

However, since it's accidental damage, AppleCare won't cover it. Fortunately, it shouldn't affect your Macs usability.

Best of luck!