I think of it as too much supervision. A micro-manager might as well do the work himself (or herself.)
A manager should be specifying the goals or objectives and letting the employees get on with the work. If the employee needs clarification or direction the manager should be available to provide answers. And leadership. If the employee can't do the job without the manager then they haven't been adequately trained or they are the wrong person for the job.
More thoughts to follow....