The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
This package contains a file named
possibly compressed, in
/usr/share/applications. This file is
generated automatically by update-desktop-database when a package
.desktop files associated to MIME types is installed.
Some upstream build systems create it automatically, but it must not be
included in a package since it needs to be generated dynamically based on
the installed .desktop files on the system.