To be honest there are loads of students on some uni courses, they can't explain to everyone individually which specific things to mention in an essay and they shouldn't give one person more information than everyone else. For that reason a lot of this sort of information is given out only in the lectures where it's your own fault if you miss it. This is university, you shouldn't need to be spoonfed things, if you get a topic and have some examples of questions you should be able to deduce what sensible things to include are. In my experience you will get credit as long as you don't write something clearly irrelevant.