I'm currently developing a plugin for MusicBee to send data to MusicBrainz, and I have a configuration UI that needs to be able to read the custom tag names so the user is able to select those tags to be synced (e.g. if someone has a separate "album genre" tag and uses the standard genre for track genres), however I don't see anything in the current API to allow this - only their values. Should this be requested to be added, or have I overlooked something?