**To describe endpoint service permissions**
This example describes the permissions for the specified endpoint service.
Command::
  aws ec2 describe-vpc-endpoint-service-permissions --service-id vpce-svc-03d5ebb7d9579a2b3
Output::
 {
    "AllowedPrincipals": [
        {
            "PrincipalType": "Account", 
            "Principal": "arn:aws:iam::123456789012:root"
        }
    ]
 }