ec2:DescribePrincipalIdFormat is a List access-level action in the ec2 service. Grants permission to describe the ID format settings for the root user and all IAM roles and IAM users that have explicitly specified a longer ID (17-character ID) preference
This action does not support resource-level permissions; use "Resource": "*" in your policy.
No condition keys are documented for this action.
A minimal policy that allows ec2:DescribePrincipalIdFormat. Replace "Resource": "*" with a specific ARN to follow least privilege.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowEc2DescribePrincipalIdFormat",
"Effect": "Allow",
"Action": "ec2:DescribePrincipalIdFormat",
"Resource": "*"
}
]
}