Not at all. In fact, when delegating IAM access (where security is top of mind), account IDs are shared liberally. Account IDs are as secret as phone numbers.

Not at all. In fact, when delegating IAM access (where security is top of mind), account IDs are shared liberally. Account IDs are as secret as phone numbers. That bit of info could be tangentially useful to an attack, but really shouldn't be assumed to be secret in any meaningful way.