Artists (both track and release), recordings, works, and other similar entities all have an accompanying tag in files (e.g. MUSICBRAINZ_ARTISTID for track artists on a FLAC file) that contains their MBID to identify them uniquely, even in the face of duplicate names.

Labels do not get such a tag, which makes using them for navigating a music library significantly less useful than entities which do have their MBIDs included. When special-purpose labels are involved this is especially annoying (e.g. https://musicbrainz.org/label/157afde4-4bf5-4039-8ad2-5a15acc85176 vs. https://musicbrainz.org/label/d20d7689-f4e8-4738-b0a9-ca1ef5959edc).

I propose including a MUSICBRAINZ_LABELID tag with releases as well.