I use this phrase all the time. It comes down to if you do not communicate clearly to your people they will not do what you want.
Have you ever said “just come and hang at the front door or come and get to know students.” Those are great lines but how do adults do that? What do they do? Why do they do what they do?
I believe you should give them a job description (short brief and to the point – Keep it Simple Stupid) that defines what you want them to do.
I would not put it in paragraph form either, use bullet points!!! Make it simple to read and very purposeful to read.
Delegation without Definition equals disaster!!!