Exactly when can we create a new tag?

Question

For this question, i had created the new tag called horary-astrology. As is evident from the shared wiki link, horary is a distinct branch of astrology. So, for my question it is more apt a tag to use than the regular astrology tag.

But, it was removed.

From this page:

As a general rule, you should avoid creating new tags if possible, and new users are not allowed to create new tags. Even if you have sufficient reputation, you should only create new tags when you feel you can make a strong case that your question covers a new topic that nobody else has asked about before on this site

So, in this particular case, i am probably asking on a topic which has not been hitherto dealt with here.

Questions:

1.So, how was the tag creation wrong or against the rules and why was it removed?
2. Under what circumstances this particular tag-creation would have been considered as correct? Or the message given is we can not create it at all no matter what?

My points are:

1. Horary is a distinct branch of astrology. So, it demands a new tag for it. When more questions are asked on the subject the users can use it.
   
2. By removing the tag the signal given is "Don't ask questions on Horary" Or "When we have astrology tag already this new tag is not needed", but this is wrong.
   
3. If a question is specifically on Horary then the Horary tag obviously should go with it. We can also tag with astrology though, just like some questions are tagged with both Veda and Rig Veda.

From wiki on Horary:

Horary astrology has its own strict system. The position of and aspects to the moon are of prime importance. The person asking the question, or querent, is represented by the ruler of the sign the first house cusp falls on in the horoscope. Planetary aspects to the house cusps are considered more important than in other branches of astrology

From here you can read about traditional Hindu horary by Bhattopala. And, here is a book on Prasna Tantra (or Horary astrology) by the well-known B.V.Raman. So, the subject has it's own methods and which are distinct from those of Natal astrology.

Answer 1

So, how was the tag creation wrong or against the rules and why was it removed?

First of all the removal was a simple edit may be to avoid creation of distinct tag from astrology, nothing here is to indicate that you're against the rules etc. So, it sounds you've taken the tag removal very seriously. You could discuss with editor and explain it.

As I discussed previously and you've also stated that:

As a general rule, you should avoid creating new tags if possible, and new users are not allowed to create new tags. Even if you have sufficient reputation, you should only create new tags when you feel you can make a strong case that your question covers a new topic that nobody else has asked about before on this site

Another thing to note while tagging a question to a new tag is:

Tagging Don'ts:

Try not to create new tags. If you create a new tag, that tag is guaranteed not to help your question show up on any subscribed RSS feeds or interesting tag lists. Again, the look-ahead prompt can help with this. Odds are it also means you're missing an existing tag for that topic that would more accurately categorize your question.

So, since tags are used to classify the question, it would be useful to use existing popular tag.

Here we already have astrology tag which can cover all the topics related to astrology and Jyotisha i.e Horary as well as Natal Astrology are supposed to be well covered by the astrology tag.

You initially tagged your question with only horary-astrology which can cuase your question ignored or lesser viewd. That's why I think the editor has tagged your question with astrology tag.

Now, it would be better to create a tag if community can get benefit of it i.e if there are well scope of getting question on that topic. Here astrology is a popular tag and that would also work for your question.

Anyway, if you want the horary-astrology tag, I recommend to use astrology tag along with it. As it's suggested:

Effective Tags - Bring more attention to your question

At a minimum, try to include at least one very broad tag (e.g., java or c#) and one other tag to narrow the topic down within that broader category (e.g., strings or garbage-collection).

So, if you feel that astrology tag would work well for your question, no need to create separate tag for horary-astrology and if you feel the horary-astrology tag would be beneficial to the community, no problem with it's creation, just keep in mind to tag atleast one broader tag i.e astrology alongwith horary-astrology