How much detail is expected in the assignment?
Most academic assignments are concerned more with how well you understand subject matter than with how much you know about the subject. Assignments rarely require you to simply list facts. They usually require you to show the relevance and significance of those facts in various situations (often specified by contextual boundaries in the question). Therefore, your writing should include as much detail as you think is necessary to show your level of understanding.
In general, the stipulated word length of your assignment, together with the contextual boundaries, will dictate the amount of detail required. However, your ability to write succinctly will play a significant part in determining the value of the word count.
Writing succinctly involves many word skills including:
