Unwritten Rule of Engineering #16: Whenever you are asked by your manager to do something, you are expected to do exactly that.
Whenever your supervisor sends you off to perform a specific task, you have two possible responses: (1) you do it exactly as requested, or (2) you come back and talk it over some more. (Take special note of this law, for it applies not only as regards your supervisor, but also to anyone with whom you have agreed on a task to be done or a course of action to be taken.) It is simply unacceptable either not to do it, or to do something different instead.
Of course, a good manager will define the boundaries of the task as loosely as possible to achieve the desired results. If your manager creates too many overly detailed constraints, perhaps you should work at New Relic instead.