Gratuitously stolen from http://blogs.technet.com/kevinholman/archive/2007/12/12/adding-custom-information-to-alert-descriptions-and-notifications.aspx

Adding custom information to alert description (s) and notifications

This is just a dump of some alert description variables I pulled from several other bloggers:

Custom Properties for Alert

Description and Notification:

Alert Description Variables:

For event Rules:

EventDisplayNumber (Event ID): $Data/EventDisplayNumber$
EventDescription (Description): $Data/EventDescription$
Publisher Name (Event Source): $Data/PublisherName$

EventCategory: $Data/EventCategory$
LoggingComputer: $Data/LoggingComputer$

EventLevel: $Data/EventLevel$

Channel: $Data/Channel$
UserName: $Data/UserName$

EventNumber: $Data/EventNumber$

For event Monitors:

EventDisplayNumber (Event ID): $Data/Context/EventDisplayNumber$
EventDescription (Description): $Data/Context/EventDescription$
Publisher Name (Event Source): $Data/Context/PublisherName$

EventCategory: $Data/Context/EventCategory$
LoggingComputer: $Data/Context/LoggingComputer$

EventLevel: $Data/Context/EventLevel$

Channel: $Data/Context/Channel$
UserName: $Data/Context/UserName$

EventNumber: $Data/Context/EventNumber$

For Repeating Event Monitors:

EventDisplayNumber (Event ID): $Data/Context/Context/DataItem/EventDisplayNumber$
EventDescription (Description): $Data/Context/Context/DataItem/EventDescription$
Publisher Name (Event Source): $Data/Context/Context/DataItem/PublisherName$

EventCategory: $Data/Context/Context/DataItem/EventCategory$
LoggingComputer: $Data/Context/Context/DataItem/LoggingComputer$

EventLevel: $Data/Context/Context/DataItem/EventLevel$

Channel: $Data/Context/Context/DataItem/Channel$
UserName: $Data/Context/Context/DataItem/UserName$

EventNumber: $Data/Context/Context/DataItem/EventNumber$

Performance Threshold Monitors:

Object (Perf Object Name): $Data/Context/ObjectName$
Counter (Perf Counter Name): $Data/Context/CounterName$
Instance (Perf Instance Name): $Data/Context/InstanceName$
Value (Perf Counter Value): $Data/Context/Value$

Service Monitors:

Service Name $Data/Context/Property[@Name=’Name’]$
Service Dependencies $Data/Context/Property[@Name=’Dependencies’]$
Service Binary Path $Data/Context/Property[@Name=’BinaryPathName’]$
Service Display Name $Data/Context/Property[@Name=’DisplayName’]$
Service Description $Data/Context/Property[@Name=’Description’]$

Logfile Monitors:

Logfile Directory : $Data/Context/LogFileDirectory$
Logfile name: $Data/Context/LogFileName$
String: $Data/Context/Params/Param[1]$

Logfile rules:

Logfile Directory : $Data/EventData/DataItem/LogFileDirectory$
Logfile name: $Data/EventData/DataItem/LogFileName$
String: $Data/EventData/DataItem/Params/Param[1]$

Notifications:

$Data/Context/DataItem/AlertId$ The AlertID GUID

$Data/Context/DataItem/AlertName$ The Alert Name

$Data/Context/DataItem/Category$ The Alert category

PerformanceHealth,PerformanceCollection,Operations,EventCollection,

StateCollection,SoftwareAndUpdates,Alert,System,Custom,AvailabilityHealth,

ConfigurationHealth,SecurityHealth,Discovery,NotificationCategory,Maintenance

$Data/Context/DataItem/CreatedByMonitor$ True/False

$Data/Context/DataItem/Custom1$ CustomField1

$Data/Context/DataItem/Custom2$ CustomField2

$Data/Context/DataItem/Custom3$ CustomField3

$Data/Context/DataItem/Custom4$ CustomField4

$Data/Context/DataItem/Custom5$ CustomField5

$Data/Context/DataItem/Custom6$ CustomField6

$Data/Context/DataItem/Custom7$ CustomField7

$Data/Context/DataItem/Custom8$ CustomField8

$Data/Context/DataItem/Custom9$ CustomField9

$Data/Context/DataItem/Custom10$ CustomField10

$Data/Context/DataItem/DataItemCreateTime$ UTC Date/Time of Dataitem created

$Data/Context/DataItem/DataItemCreateTimeLocal$ LocalTime Date/Time of Dataitem created

$Data/Context/DataItem/LastModified$ UTC Date/Time DataItem was modified

$Data/Context/DataItem/LastModifiedLocal$ Local Date/Time DataItem was modified

$Data/Context/DataItem/ManagedEntity$ ManagedEntity GUID

$Data/Context/DataItem/ManagedEntityDisplayName$ ManagedEntity Display name

$Data/Context/DataItem/ManagedEntityFullName$ ManagedEntity Full name

$Data/Context/DataItem/ManagedEntityPath$ Managed Entity Path

$Data/Context/DataItem/Priority$ The Alert Priority Number (High=1,Medium=2,Low=3)

$Data/Context/DataItem/Owner$ The Alert Owner

$Data/Context/DataItem/RepeatCount$ The Alert Repeat Count

$Data/Context/DataItem/ResolutionState$ Resolution state ID (0=New, 255= Closed)

$Data/Context/DataItem/ResolutionStateLastModified$ UTC Date/Time ResolutionState was last modified

$Data/Context/DataItem/ResolutionStateLastModifiedLocal$ Local Date/Time ResolutionState was last modified

$Data/Context/DataItem/ResolutionStateName$ The Resolution State Name (New, Closed)

$Data/Context/DataItem/ResolvedBy$ Person resolving the alert

$Data/Context/DataItem/Severity$ The Alert Severity ID

$Data/Context/DataItem/TicketId$ The TicketID

$Data/Context/DataItem/TimeAdded$ UTC Time Added

$Data/Context/DataItem/TimeAddedLocal$ Local Time Added

$Data/Context/DataItem/TimeRaised$ UTC Time Raised

$Data/Context/DataItem/TimeRaisedLocal$ Local Time Raised

$Data/Context/DataItem/TimeResolved$ UTC Date/Time the Alert was resolved

$Data/Context/DataItem/WorkflowId$ The Workflow ID (GUID)

$Target/Property[Type=”Notification!Microsoft.SystemCenter.AlertNotificationSubscriptionServer”/WebConsoleUrl$

The Web Console URL

Target/Property[Type=”Notification!Microsoft.SystemCenter.AlertNotificationSubscriptionServer”/PrincipalName$ The principalname of the management server

$Data/Recipients/To/Address/Address$ The name of the recipient (e.g. the Email alias to which the notification is addressed)