Granting NeptuneReadOnlyAccess to Amazon Neptune databases using AWS managed policy

The NeptuneReadOnlyAccess managed policy below grants read-only access to all Neptune actions and resources for both administrative and data-access purposes.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowReadOnlyPermissionsForRDS",
            "Effect": "Allow",
            "Action": [
                "rds:DescribeAccountAttributes",
                "rds:DescribeCertificates",
                "rds:DescribeDBClusterParameterGroups",
                "rds:DescribeDBClusterParameters",
                "rds:DescribeDBClusterSnapshotAttributes",
                "rds:DescribeDBClusterSnapshots",
                "rds:DescribeDBClusters",
                "rds:DescribeDBEngineVersions",
                "rds:DescribeDBInstances",
                "rds:DescribeDBLogFiles",
                "rds:DescribeDBParameterGroups",
                "rds:DescribeDBParameters",
                "rds:DescribeDBSubnetGroups",
                "rds:DescribeEventCategories",
                "rds:DescribeEventSubscriptions",
                "rds:DescribeEvents",
                "rds:DescribeGlobalClusters",
                "rds:DescribeOrderableDBInstanceOptions",
                "rds:DescribePendingMaintenanceActions",
                "rds:DownloadDBLogFilePortion",
                "rds:ListTagsForResource"
            ],
            "Resource": "*"
        },
        {
            "Sid": "AllowReadOnlyPermissionsForCloudwatch",
            "Effect": "Allow",
            "Action": [
                "cloudwatch:GetMetricStatistics",
                "cloudwatch:ListMetrics"
            ],
            "Resource": "*"
        },
        {
            "Sid": "AllowReadOnlyPermissionsForEC2",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeAccountAttributes",
                "ec2:DescribeAvailabilityZones",
                "ec2:DescribeInternetGateways",
                "ec2:DescribeSecurityGroups",
                "ec2:DescribeSubnets",
                "ec2:DescribeVpcAttribute",
                "ec2:DescribeVpcs"
            ],
            "Resource": "*"
        },
        {
            "Sid": "AllowReadOnlyPermissionsForKMS",
            "Effect": "Allow",
            "Action": [
                "kms:ListKeys",
                "kms:ListRetirableGrants",
                "kms:ListAliases",
                "kms:ListKeyPolicies"
            ],
            "Resource": "*"
        },
        {
            "Sid": "AllowReadOnlyPermissionsForLogs",
            "Effect": "Allow",
            "Action": [
                "logs:DescribeLogStreams",
                "logs:GetLogEvents"
            ],
            "Resource": [
                "arn:aws:logs:*:*:log-group:/aws/rds/*:log-stream:*",
                "arn:aws:logs:*:*:log-group:/aws/neptune/*:log-stream:*"
            ]
        },
        {
            "Sid": "AllowReadOnlyPermissionsForNeptuneDB",
            "Effect": "Allow",
            "Action": [
                "neptune-db:Read*",
                "neptune-db:Get*",
                "neptune-db:List*"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}