You don't need to manually hover over a tag: when you edited the tags on a question and started typing "ca...", the giant tag dialog box appears immediately:
I don't want to go on a rant here, but this has been an ongoing issue on Programmers (and presumably other sites), and it's a symptom of a larger, systemic problem with tags:
- Nobody reads tag wiki excerpts, even when they're automatically displayed right in front of them.
- It's impossible to guide the usage of a tag through UI cues or social engineering.
career sucks. It's a meaningless tag and is used by people to justify asking weak, off-topic, not constructive questions and not bother tagging such questions with anything useful. By June of last year, Programmers had 1,400 questions tagged with it. It's taken us close to 6 months to retag/delete 700 questions in the tag, and we're nowhere close to being finished.
In the meantime, we've been trying to get crappy tags like career blacklisted so people can't use them no matter what they do and allow us to cap the number of questions we have to sort out, but we've gotten pushback from Stack Exchange about doing so until the tags are manually cleared first.
The common sense solution is to read before you use a tag: it's right there in front of you. I don't know how much clearer it can be made save for it blinking at you and an audible alert saying "HEY DON'T USE THIS TAG!"
The realistic solution is for SE to be far more liberal with blacklisting tags, particularly when it's been demonstrably shown a tag is detrimental to the site and people aren't paying attention to the plethora of warnings that they shouldn't be using the tag.