I see the article focuses on tasks and things to do or not do.

These are primarily driven by skills of the junior. Though you should expect they have none.

What sort of comes out between the lines is the attitude of the person, and I think this matters most and should be framed directly.

You want someone curious that will peek beyond what you asked. Someone proactive that will not sit and wait for an assignment. Someone meticulous that will not self-satisfy of quick-and-dirty.

When said like this, the article content resonates as the consequences rather than objectives.