The tag is present in Lintian version 2.109.6. That is the most recent version we know about.
This info document has no INFO-DIR-SECTION line.
install-info will be unable to determine the section into which
this info page should be put. The best solution is to add a line like:
@dircategory Software development
to the texinfo source so that the generated info file will contain a
/usr/share/info/dir for sections to choose from.
You will have to ensure that the build process builds new info files
rather than using ones built by upstream.