Ambiguous requests usually contain a real need, but the useful shape is buried under missing context. The first job is to identify the user, the constraint, and the outcome.
Find the decision point
Good scoping questions are not generic discovery theater. They reveal which decision someone needs to make, which system has to change, or which risk needs to be reduced.
Make the next action explicit
Once the outcome is clear, write down the smallest useful step that can be verified. That keeps delivery moving while still leaving room to refine the larger system.