nah...
you dont even need an actual bibliography let alone an annotated one. do one if you really want to but exerting your energy somewhere else would be better. markers dont even look at annotated bibliographies unless the validity of your research has come into question. i thought about an annotated bibliography but then decided just to do a normal one - i couldnt be bothered because all the annotations would end up sounding the same. if your bored and have nothing to do, go ahead. its not a necessity to have one, most people only do them to bulk up their major work. however, i do think that having a normal bibliography is a good idea - it makes your work look a little more academic.
to annotate or not? - that is your question...i say the markers dont give two shits if you do or if you dont include annotations.
but a normal bibliography is encouraged (although not a requirement).
thank god this is nearly over hey...