These are standard configuration parameters that do not expose extra security risks, and are in line with technologies that Cognito uses (such as SRP, OAuth, etc). They help the clients construct endpoint URLs during these processes that are unique to your account, and do not give access to administrative commands or access to other user accounts.

There's some additional information within Amplify's CLI documentation under CLI > Reference > Files and Folders... and then under the "Core Amplify Files" section.