Android permission "find accounts" details?

[Android987654321]

How much personal data does the android permission "find accounts" really give? Does it just list the accounts on this device, or does it give the App all the usernames/email addresses associated with those accounts?

 

[SmItH197]

Find accounts is used by apps for 'one tap' sign in (e.g. signing in with a Google or Facebook).

"An app with the "use accounts on the device" permission can, once installed, ask you to access an online service (such as Google, Facebook, or Twitter) in your name. You can choose to let it access the service or not. If you do let it access the service, what actions it can take on your behalf might be limited by the service (it's up to the service), and the service might let you revoke that permission later (usually through a list of "connected apps" on the service's website)."
Source: http://android.stackexchange.com/qu...ith-the-use-accounts-on-the-device-permission

 

[SmItH197]

Source for the above: What can an app do with the "USE ACCOUNTS ON THE DEVICE" permission? - Android Enthusiasts Stack Exchange

 

[Android987654321]

Thanks, but that's not actually what I was asking.

What I'd like to know is without my permission what information will an App have access to. E.g. will it have the email account associated with my Facbook account? Will it have a listing of the email accounts that are set up on my phone?