The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The package installs a directory in
/usr/local/... which is
If you want to provide an empty directory in
convenience of the local system administrator, please follow the rules
in the policy manual (section 9.1.2), i.e., create the directories in
the postinst script but don't fail if this isn't possible (e.g. if
/usr/local is mounted read-only).
Refer to Debian Policy Manual section 9.1.2 for details.