Let them know where you stand. And find out where they stand by exchanging 'commander's intent' messages.
Commander's Intent - A way to deal with incomplete or changing requirements
Commander's Intent is a military concept. It seems to have been first articulated by the Prussians after their defeat by Napoleon's conscript army in 1806. Commander's Intent is "the commander's stated vision which defines the purpose of an operation, the end state with respect to the relationship among the force, the enemy and the terrain; it must enable subordinates to quickly grasp the successful end state and their part in achieving it".
by Sanjay Mishra