In my opinion this validation is too strict, because it literally defines how description should look like. It will fail so many times for trivial reasons, like caption is too short, caption is too long, caption should start with a capital letter (even if first word is a stylized program name like `dconf Editor`, `gImageReader`, etc.), description cannot contain a hyperlink, etc. This actually may require a lot of editorial work on the vendor side. I'm not sure if they'll be happy about it.