This question is a follow up to this question.
A new colleague of mine is on his trial period before being accepted on as a full time employee. As he will be a part of my department HR has asked for peer reviews how the rest of us work with him. He is young and just graduated from University, he is cocky in his skills and he gets on my nerves quite often. I try to overlook these feelings and we keep a polite if not cordial working relation.
Unfortunately he has been making waves. My workplace blur the line between blue-collar and white-collar employees, many of those in my department used to work on the floor but a degree is not uncommon.
My colleague has a condescending way of speaking, likely he is not aware of this. As I am often down on the floor chatting and working with them I get parts of the scuttlebutt. He has been in conflict with at least one of the more senior colleagues on the floor, I could later confirm this after some gentle proding. There are other rumors as well but I can't confirm those. On the other hand, in my department there is more leeway with "excentric" characters and he is perceived more neutral with a slight bias towards the positive. I suppose it helps that he keeps to himself.
I am hesitant what to do as he occationally rubs me the wrong way but at the same time people with his education are needed in the company. I can't comment on the quality of the work he does as we haven't worked together but it is probable that I will be paired with him for future projects. I am not looking forward to it.
Question: How honest should I be in my appraisal and should I weigh in what the scuttlebutt says (only when I can confirm it)?