AWS Cloudshell deny upload and download of files

Cloudshell.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "CloudShellUser",
            "Effect": "Allow",
            "Action": [
                "cloudshell:*"
            ],
            "Resource": "*"
        },
        {
            "Sid": "DenyUploadDownload",
            "Effect": "Deny",
            "Action": [
                "cloudshell:GetFileDownloadUrls",
                "cloudshell:GetFileUploadUrls"
            ],
            "Resource": "*"
        }
    ]
}