Yes, we should keep it
First up, the following issues you have pointed out can be fixed (and I am in the process of doing that):
- it will have a tag wiki soon
- the excerpt will be clarified to express what the tag has really been used for.
Note: I have gone ahead and corrected the above issues. Feel free to revise my suggested wiki page: view it here.
Tag correlation - a misdirect
So, what issues are left? Well, you have this:
I ask: "So what?" - those numbers are just numbers, and I can't see what you are trying to say. Are you suggesting that if 10% of the questions are tagged "specific question" that we don't need "site-policy"? Well, about 15% of discussion is tagged with specific-question - so I suppose we should throw out discussion too?
View-count - another misdirect
Now, about the view-count of the info page. It has been viewed 7 times. Yes, that's true, but, the purpose of the tag is, in my mind, so clear that I have never needed to visit the info page. Also, the numbers are not useful either... tags has been viewed 6 times and has more questions.... should we throw out tags because of that? specific-question has been viewed 5 times, also with more questions....
What's left after we remove the red-herring discussion about the quantity of tagged questions and the view-count of the info page?
I believe it's a meta-meta tag. meta is all about site-policy, so any question could be tagged with it, which makes the tag utterly useless for categorizing meta questions.
Well, let's see. Here are two lists of top-voted questions: One contains questions tagged "site policy", the second does not. Can you spot a difference?
With site-policy helpful search:
Without site-policy helpful search:
I would say it is clear that the tag is quite useful, it clearly distinguishes between questions that set site policy and processes, and other questions which are not.
Keep the tag!
Your arguments for throwing out the tag are not relevant.
- The things that could be (easily) fixed have been fixed.
- The numbers you presented to suggest there was an issue with the tag, do not support your argument.
- The 'belief' that there's no discernable difference between site-policy questions and other questions, is also quite clear that site-policy makes a useful distinction between questions that add to site policies, rules, and procedures, and those questions which are about other aspects of the site.