be vague

See: equivocate
References in classic literature ?
The constitution of New York, to avoid investigations that must forever be vague and dangerous, has taken a particular age as the criterion of inability.
But good goals must also be vague on the "how" so that the senior team has latitude on how the goal will be accomplished.
If candidates are vague communicators in the interview, chances are they will be vague communicators in their jobs, as well.