sts-notify-new-agent-body

/**
 * Filters the text message
 *
 * @since 1.0.7
 *
 * @param 	(string) 	$text 			the message
 * @param 	(int) 		$post_id		the ticket ID
 * @param 	(array) 	$post_data		the post data
 * @return 	(string) 	$text 			the message
 */

This filter enables you to filter the email text for a newly assigned agent. It is executed in sts_notify_new_agent().