Like I wrote in chat, I think that some of the tag excerpts on this site could use some work, especially with regard to usage guidance. The purpose of tag excerpts and guidelines for writing them are outlined in the help center, but especially points 2. and 4. are the ones where I think we could do better:
- Avoid generically defining the concept behind a tag, unless it is highly specialized. The “email” tag, for example, does not need to explain what email is. I think we can safely assume most internet users know what email is; there’s no value in a boilerplate explanation of email to anyone.
This is what many tags seem to do. If the tag name is an acronym it is useful to spell it out, of course, and most of the tags are a lot more specialized than "email", but often the limited space would be better used otherwise.
- Provide basic guidance on when to use the tag. In other words, what kinds of questions should have this tag? Tags only exist as ways of organizing questions, so if we don’t provide proper guidance on which questions need this tag, they won’t get tagged at all, rendering the tag excerpt moot. Think of it as a sales pitch: in a room full of tags screaming “pick me!”, what would convince a question asker to select your tag?
This is the key thing that's lacking. For example, the tag cryptanalysis does not tell you when you should tag your question with it. This seems important especially as a rather large class of such questions is off-topic.
Do you feel this is important or is it a minor issue?
Is a concentrated effort needed or is it just a few random tags that need work?
How to go about it?