code: public JsonObject describeCommand(String service, String command) {
          return Command.matchCommand(restMetadataJson, command, service);
          
      }
docs: Describe command that helps give the idea what client needs to build the command
  @param service service name such as 'SpiderService' for application commands or '_systems' for system commands
  @param command command name
  @return JsonObject result in JSON that contains the description of the command