How do you tell event restrictions?

I think joining other people to co-op or PVP their campaigns is a cool idea, so I try to join other people whenever I can. However, I can’t seem to tell what the restrictions for the events are - I also have this problem when by myself doing road events or what have you.

It shows the category of cars for the race (Retro Sports Cars or Hot Hatch or whatever) but it doesn’t say any further restrictions beyond that - is there a way to tell the restrictions for an event? I don’t like joining other people only to find out I don’t have any cars that can be in that race.