S3 / MinIO política ejemplo mínimo: Acceso de solo lectura a un bucket

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "s3:GetBucketPolicy",
                "s3:GetBucketLocation",
                "s3:ListAllMyBuckets",
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::mybucket"
            ],
            "Sid": ""
        },
        {
            "Action": [
                "s3:GetObject",
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::mybucket",
                "arn:aws:s3:::mybucket/*"
            ],
            "Sid": ""
        }
    ]
}