What does a literature review for the purposes of a political science paper entail? (Details inside)

I am writing a fairly short paper (1200 words), and I have just discovered that a literature review for our sources is required for our papers. Naturally, our professor never once mentioned this as a requirement.~ Long story short, the paper is due tomorrow and I can’t seem to find a solid explanation or example of what a literature review for resources is actually supposed to contain. The only examples I have found are entire papers just about a specific publication. Keep in mind that there are about 4–5 sources, all of which are journals that are 3–6 pages long, and these reviews are supposed to be part of the total 1200 words. I may be over-thinking it, but the paper itself is about a completely separate thesis so I’m a little confused as to what I should be writing for the required literary reviews and how long each should be.

Note: I have e-mailed my professor for clarification. I thought I would ask this question in the meantime, so I can hopefully get some more work done while I wait for a response (and just in case she doesn’t respond).