I know how to make the / command with xml formatting but how do I actually use it?

for example

code:

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function OnGetScriptCommands() {
    var ScriptCommands = "<ScriptCommands>";
    ScriptCommands      +=    "<Command>";
    ScriptCommands      +=        "<Name>Test</Name>";
    ScriptCommands      +=        "<Description>More Test</Description>";
    ScriptCommands      +=    "</Command>";
    ScriptCommands      += "</ScriptCommands>";

    return ScriptCommands;
}

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js code:

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function OnEvent_ChatWndSendMessage(oChatWnd, sMessage){
    if (/^\/([^\s\/]+)\s*([\s\S]*)$/.exec(sMessage) !== null) {
       
        var _command = RegExp.$1.toLowerCase();
        var _param = RegExp.$2;
        switch (_command) {
            case 'test':
                // do something here
                break;
            case 'test1':
                // do something here
                break;
        }
    }   
    return sMessage;
}

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