This article is not meaningful without more context. What the boss should say to employees needs to be at a high enough level (eg overarching goals) so that a

This article is not meaningful without more context. What the boss should say to employees needs to be at a high enough level (eg overarching goals) so that a capable employee can create their own plan to achieve it, but not so high level that the employee cannot see the steps needed to go forward. Ideally this high level goal should push the employee just beyond its capabilities, but the boss knows who to connect with in case they need help. In practice that matters much more than whether you say please or need or can or want.