query sys.dm_audit_actions for every audit action that can be r

Dynamic views and functions	Description
sys.dm_audit_actions	Returns a row for every audit action that can be reported in the audit log and every audit action group that can be configured as part of SQL Server Audit.
sys.dm_server_audit_status	Provides information about the current state of the audit.
sys.dm_audit_class_type_map	Returns a table that maps the class_type field in the audit log to the class_desc field in sys.dm_audit_actions.
fn_get_audit_file	Returns information from an audit file created by a server audit.