"spy_rank" : {
                    "description": "Returns a sorted list of spies ranked according to various stats.",
                    "parameters": [
                        {"name":"session_id", "type":"string", "optional":false},
                        {"name":"sort_by", "type":"string", "optional":true} //Defaults to level_rank. Possible values are: level_rank  success_rate_rank and dirtiest_rank