Auditing the agents involves checking which of them generate most alerts, which generate alerts which are validated, etc.
Inside the manage agents page, click on more actions and then click on statistics.
This will open a new window in which you will be able to select the type of audit you would like to run:
Type of Graph
Choose from one of the following analysis:
Type of Source
You can select to analyse only a particular type of source:
Use the other options to select the time period and the agents to audit.
In this audit I chose to compare the information validated by the number of alerts created.