MC has one of the best tagging interfaces I've ever seen. At first, MC's tagging might seem unimpressive. But if you give it a chance, you will see that the apparently simple interface is very elegant. It's easy to use and powerful. You can use expressions in tagging which lets you do all kinds of interesting things. You can tag one song, several songs, one album, or several albums all at once. (For example to set Genre on several albums at the same time, or set the Artist, etc). I encourage you to give the MC tagging interface a try. It's all I use now.
I think you are trying to ask how to prevent MC from writing to your media files. If so the setting for that is:
Tools > Options > General > Tagging > Importing & Tagging > update tags when file info changes (uncheck)
I don't know what you mean about drag and drop.
Brian.
