Hi , Try this in your UI Action code

function saveDesc() {
    var desc = g_form.getValue('description');
    g_form.setValue('description', desc);
    gsftSubmit(null, g_form.getFormElement(), 'save_dec'); 
}
if(typeof window == 'undefined')
runBusRuleCode();

//Server-side function
function runBusRuleCode(){
current.update();
gs.addInfoMessage('You did it!'); //testing
action.setRedirectURL(current);
}