The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
/etc/init.d script has an LSB keyword section, but it
is missing the given required LSB keyword. If the value of this keyword
should be empty, please still include it in the LSB keyword section with
an empty value.
Please refer to https://wiki.debian.org/LSBInitScripts for details.