However, it would still be a welcome addition to Mp3tag, and would save users from the need to create a tool to do something so simple. It's a very common feature in other software packages. And if it were on the context menu it would be more convenient than having it down in the Tools menu.
While we're at it: How about the option to make the Tools menu a section within the context menu instead of having it as a submenu? Again, this is a common option in other software. A user with a lot of tools might not want to use it, but if (like me) you have only a handful of tools, they'd be easier and quicker to use if they were directly on the context menu.