I am studying mechanics at the university. Last summer, I did a great internship in an auto industry company. This internship was really rewarding, I did a useful job and I learned many things on different subjects. My co-workers were really nice to me and my tutor made me have an incredible first working experience by showing me all the departments, the factories, etc. I happened to get this internship by contacting via LinkedIn a former student of my university who is working there. Also, my university is keeping a database with all the internships the students have done, to allow other students to see in what kind of company they can apply to and read the internship reports.
Some days ago, a student from my university asked me if I could give him the name and email address of my former tutor in the company I did my internship as he is very interested in doing one there. The problem is: I know this student for being unreliable. He was part of different student societies this year and a lot of people complained about his inability to do what he was asked, to attend meetings and to be available to organize events. But on the other hand, when we talked together, he was always very nice with me and we had some interesting conversations about the auto industry, races and so on. I feel like if I give him the contact of my former tutor, he may get in touch with him and disappoint him. Even if he doesn’t get an internship, he may act as usual, i.e. not replying to emails or not doing what my former tutor may ask him to do. I want to keep a good relationship with my former tutor and I feel it could be jeopardized if I “send” him a student who is not serious.
How can I tell him I don’t want to give him the contact of my former tutor without being rude?