Three things per entry, not one
A summary of what the source actually did and found. An appraisal of how much weight it can carry, including its design and its limits. And a placement: what this source contributes to your specific question that the others do not.
Most submitted annotations do only the first, which is why they score in the middle and why they are useless later. A summary tells you a paper exists. An appraisal tells you what you can do with it.
Appraisal means naming the limits
Sample size and how it was recruited. Whether the design supports a causal claim or only an association. Whether the setting resembles the one you are writing about. Whether the outcome measured is the outcome you care about.
None of that requires hostility to the source. It requires being specific about what it can and cannot support, which is the same discipline that stops a citation being attached to a claim slightly too wide for it.
The placement is what makes it reusable
Once each entry says how it relates to the others — confirms, complicates, contradicts, extends — the shape of your literature review is already visible on the page. Groupings emerge, disagreements become themes, and gaps become the thing your own work addresses.
That is why the annotation is worth doing well even when it is worth few marks. It is the cheapest possible version of work you will otherwise do later under more pressure.
There is a specific late failure this prevents as well. Students who annotate thinly reach the writing stage, discover that two of their sources actually contradict each other, and have to reopen the reading with a deadline in view. Noticing that during annotation costs an afternoon; noticing it in the final fortnight costs a great deal more.
Three steps, then the record keeps itself.
Send the question and the sources
Your research question and whatever you have so far. If the list is thin, the search runs first.
Get the three-part annotations
Summary, appraisal and placement for each entry, in the format your assignment specifies.
Use it as the review's skeleton
The groupings and disagreements are already identified, which is most of the literature review's structure.
Queries on record.
How long should each annotation be?
Whatever your assignment states, and where it does not, roughly 150 to 200 words is usual for graduate work. The length matters less than the balance: an annotation that spends everything on summary and nothing on appraisal is the wrong shape regardless of word count, and it is the most common fault by a wide margin.
Do I have to read every source in full?
You need to read enough to appraise it, which for most papers means the method and the results properly and the discussion critically. Reading only the abstract is what produces annotations that are subtly wrong, because abstracts state findings without the conditions attached to them and those conditions are usually the important part.
What if a source turns out to be weak?
Say so and keep it if it is relevant, because a bibliography that includes a weak study with its weakness named is more useful than one that quietly drops it. Part of what is being assessed is whether you can tell the difference, and demonstrating that is worth more than presenting a uniformly strong list.
Should annotations be in my own voice?
They should sound like you, and they are drafted from a sample of your writing where one exists, because an annotated bibliography is often the first substantial thing a new instructor reads from you. A register that shifts between this and your next submission is noticeable, and the fix costs nothing at the drafting stage.
Can this become my literature review?
Not directly, and it makes writing one much faster. A review is organised by theme or by argument, while a bibliography is organised by source, so the material has to be reassembled. But the reading, the appraisal and the relationships between sources are already done, which is the part that takes weeks.
Elsewhere in the hall.
Send the assignment and the deadline.
A specialist credentialed in your own field reads what you actually have and replies within two hours with a plan and a price. The reading costs nothing, and if the honest answer is that we are not the right hall for it, you will get that instead.
