Lintian tag information: menu-item-contains-unknown-tag (type: warning)
Description (from lintian-explain-tags)
The menu item has a line with a tag that is not a standard tags, such as needs=, section=, title=, longtitle=, or command= etc. While other tags can be used, it is rare. More commonly, the tag name was misspelled. Visibility: warning Show-Always: no Check: menu-format