{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowEC2TagReading",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeTags"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}

Allow instances to read their EC2 tags
Allow instances to read their EC2 tags

Recreating policies and scripts every job is past tiresome, so make
an open source version.
