The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
The menu item or desktop file command uses an su wrapper other than
su-to-root. On Debian systems, please use
su-to-root -X, which
will pick the correct wrapper based on what's installed on the system and
the current desktop environment. Using su-to-root is also important for
Live CD systems which need to use sudo rather than su. su-to-root
permits global configuration to use sudo.