Grade the account from the pattern you can document, and write the grade in plain words. The account ID, for example 0.0.1000000, is the key you file under.
What moves the grade
An OFAC match is reason enough to raise the grade. So does tight fan-in or fan-out. A pass-through of HBAR that sits beside HTS tokens, or beside EVM-compatible contract calls, belongs in the same upward step. A quiet account ID that suddenly shows a burst of activity needs a timeline. Score it only after the timeline is written.
How the grade is written
Lead with the account ID, then the check time. Put the USD balance and any no history flag next to the grade, and say which inputs came from the free check. Then stop.