Stop Vague Answers With This One Line

Vague question in, vague answer out. That's not the AI being lazy. That's the AI guessing, because you didn't give it enough to go on and it would rather invent than ask.

Flip that behavior with one line. Make it ask before it guesses.

The line

If info is missing, ask up to three clarifying questions. Then answer with
what you know. Do not guess or invent details.

Now instead of barreling ahead on assumptions, the model stops and gets the missing pieces from you first. Three quick questions up front saves you three rounds of "no, that's not what I meant" later.

A model that asks before it answers beats one that confidently fills in the blanks wrong.

Add it to your prompt or custom instructions and watch the vague replies turn into ones that actually fit. Go try it on your next messy request.