When someone posts a question with a really generic title like "Help with algebra problem" I usually check the post to find a better, much more specific title (something like "Property of Jacobson radicals") and edit right away. This is almost always the first thing I do when I revise a post.
But what differentiates edits of titles from edits of the body is that the titles are what enables the OP (and others) to find their question again. I always think that they might find it offensive when their whole title has changed a lot, but I never asked and I am not sure if any general rules apply here.
The help center on the edit privilege is not specific about titles. Specifically, I wonder:
- Shall I always ask the OP to edit the title themselves, and give them already a suggestion?
- If not: shall I always leave a comment that I edited the title (and why)?
- What about other edits in the title which do not completely replace it, but make it more specific? What rules or recommendations apply here?
For example, here I added the formula to the title because otherwise the title was pretty much meaningless. An example with a complete replacement was here.
Edit: this has been suggested as a duplicate, but this only asks for a specific situation (namely when the OP doesn't want the edit), no answer has been posted (it was also falsely marked as a duplicate by the way), and in any case I am asking for a complete set of guidelines here. Also, our guidelines for a good title don't answer my question. I know what a good title is, my question is how to coordinate the edit process with the OP.