Your standards, your questions in the margin, your voice — applied to the pile, one paper at a time.
Grade reads a student's paper and responds the way you would when you mark it. You can give it the assignment or your rubric, and the feedback is judged against what you actually asked for, not a generic notion of good writing. It returns a mark and the reasons behind it, and you can talk through the grade with your model before anything is final.
The point is to help you get through the pile with steady, consistent judgment, and to give each student the clearest feedback you can, the response they would get from you. You remain the one who decides. The grade is a draft for your judgment, not a verdict handed down in your name.
What stays yours: the judgment. The student's paper is never stored, the mark is never final until you make it so, and the standards being applied are the ones you set.