Mp3tag allows to edit metadata of common audio formats. It can rename files based on the tag information, replace characters or words in tags and filenames, import/export tag information, create playlists and more. Mp3tag supports online database lookups from, e.g., Amazon, discogs, or freedb, allowing you to automatically gather proper tags and cover art for your music library.
To install automatically Mp3tag on your LiberKey, make sure you previously activated files associations from the "LiberKey Tools" menu.
You can then open the file directly to start the installation.