The tag is present in Lintian version 2.104.319. That is the most recent version we know about.
This info document has no directory entry. This is text between
START-INFO-DIR-ENTRY and END-INFO-DIR-ENTRY lines which is copied into
dir file in
install-info. The best solution is to add lines like:
@dircategory Software development @direntry * foo: (foo). Foo creator and editor @end direntry
to the texinfo source so that the generated info file will contain an appropriate entry. You will have to ensure that the build process builds new info files rather than using ones built by upstream.