Not long ago, we had to adapt to the circumstances at hand regarding the changes to how close reasons were displayed. You can read more about this here.
We now have other changes. A good place to read about it is here. To summarize: the “Off-topic” banner has been replaced with “A community-specific reason”.
Therefore, we can effectively revert the changes we had to make in the first link I mentioned and bring back the close reason regarding context and relevance. Although this may be annoying, we are now in a situation which seems optimal and not a workaround: when the question is missing context, we communicate to the OP that the problem is not following some guidelines, which is more explicit, understandable and unambiguous to a newcomer than saying it is “off-topic” or “need[ing] details or clarity”, phrases which can have overloaded interpretations. We hope that we stabilize at this.
For reference, you can see how the closure was shown before the changes in the first link I mentioned. Now, it is shown as follows:
For the OP and those with privileges, with the difference being that “Private feedback for you” changes to “Viewable by the post author and users with the close/reopen votes privilege”:
For others:
The attentive reader may notice that there is a “Update the question so it's on-topic for Mathematics Stack Exchange” in this last image. (The “problem” being that there is a reference to being on-topic/off-topic.) If you think this is a problem, notice that it should be a minor one since it doesn't appear to the OP, who is the one that matters most. Some may even argue that this is not a problem. In any case, it should be of little relevance.
