> 1. It could easily come across as "my time is more important than yours".
Well yes, if someone comes to me to ask for help, that means they weren't able to solve it by themselves, but expect me to have the skills, knowledge or experience to help them solve it.
So my time working on this problem is obviously more valuable than theirs, because I'm expected to fix something they weren't able to.
So I think it's fair to ask them invest the time to provide a proper description of the problem, before I invest time to help them.