All reports of package-contains-thumbnails-dir for the archive. The extended description of this tag is:
Package contains a .thumbnails directory. It was most likely installed by accident, since thumbnails usually don't belong in packages.
Refer to https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html for details.
Severity: important, Certainty: certain
Check: files, Type: binary, udeb
This tag has not been emitted in any package tested by Lintian.