SandBoxes

{
    "Version": "2012-10-17",
    "Statement": [
      {
        "Sid": "EnforceTrustedOIDCTenantSandBoxes",
        "Effect": "Deny",
        "Principal": "*",
        "Action": "sts:AssumeRoleWithWebIdentity",
        "Resource": "*",
        "Condition": {
          "StringNotEqualsIfExists": {
            "sandboxes.cloud:aud": "<ORGNAME>"
          },
          "Null": {
            "sandboxes.cloud:aud": "false"
          }
        }
      }
    ]
  }