Seems weird to me that asking a specific question about what it is you're trying to achieve would be negative. Especially since most interviews often open with feel free to ask clarifying questions or something along those lines.

If the prompt is unclear its worth getting clarity, just like if something is unclear in the job you seek clarity, I feel like people not asking questions would be a big red flag.

of course, asking too many (this is subjective but I think we can all think of a reasonable situation where there were too many questions being asked relative to their value) could be a red flag