Tau-Bench checks an agent's final database edits against expected values in CSV-style datasets to determine whether the task succeeded.

“interact with certain databases for read and write operations and it is predefined that once the whole agent task is done then they will validate on the final edits made on and they will check for the expected value in the data sets in the database which are basically CSV style of files and in that fashion they will validate whether the task was done or not”