What tags does the plugin read?

[make-nz]

What tags does the plugin read in general?

This is what I can set in my tagger, but can not find any documentation on if I need any such tags, or not.
DISCOGS_RELEASE_ID
DISCOGS_ARTIST_ID

[c-esc]

Jf (ffprobe I assume) should read any metadata from the files but flac metadata (vorbis comments) has no real standard tags so my guess is DISCOGS_RELEASE_ID and other obscure tags get just ignored.