s3-snap-limited.json

{
    "Statement": [
        {
            "Action": [
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::snaps.example.com"
            ]
        },
        {
            "Action": [
                "s3:GetObject",
                "s3:PutObject",
                "s3:DeleteObject"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::snaps.example.com/*"
            ]
        }
    ],
    "Version": "2012-10-17"
}

s3-snap-with-condition.json

{
    "Statement": [
        {
            "Action": [
                "s3:ListBucket"
            ],
            "Condition": {
                "StringLike": {
                    "s3:prefix": [
                        "foo/*"
                    ]
                }
            },
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::snaps.example.com"
            ]
        },
        {
            "Action": [
                "s3:GetObject",
                "s3:PutObject",
                "s3:DeleteObject"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::snaps.example.com/foo/*"
            ]
        }
    ],
    "Version": "2012-10-17"
}