When I found myself writing the same comments time after time, I created this rubric, which sped up my grading time considerably. I also have students use it to assess each other's work, which has greatly improved their own annotations. Students find it helpful and easy to use.
This rubric assesses color-marking, annotating, and short answer responses. Each category is worth 5 points, so an overall score of 15 is possible. I use it on poetry annotations and close reading annotations.