[MBCook]

The game never asks for access, it's not clear in any way how much information you're giving them.

In the past I've tried to use Google to sign in to some games and been given a screen that I noped out of because of what it was asking for. That didn't happen here. I assumed they only got my email address (if that), not full email/contact/calendar history.

I checked my Google permissions. iOS has a fair amount, Mac OS X has a fair amount, Pokémon GO has more than both put together. Without asking. That's crazy.