The email is only a notification to the current on call user. There is very little information in the email beyond a basic summary and severity such as:
Alert Status: NOTIFIED
Time of Alert: 19/06/13 12:06:41 PM
from: MyOrion6
lab-win7x86's Alert me when an interface goes down
Assigned To: IT - Linux
Severity: Warning
Last Note:
Ned Stark was notified at ned.stark@cjones.org
On Call Now:
Ned Stark (IT - Linux)
User will have to determine if that is enough info to reply or if they need to click the link and see more about the alert and its original source (email or orion).
If you would like more alert info in the emails then i would make a feature request for it: Alert Central Feature Requests
Alert Central tries to only pull very generic stuff so that it can support many different sources of alerts.