System Center Operations Manager LogoIn a SCOM Management Pack Custom Properties can be used for Alert Description and Notification as described in this blog by Kevin Holman.

In my case I wanted to add the Display Name and the Performance Counter Value in a Performance Threshold Monitor. In XML it would look this this:

But how to add these parameters when using the System Center 2012 Visual Studio Authoring Extensions?

There is no place in the properties to add extra Alert Parameters:

Visual Studio Authoring Extensions | Alert Properties

The solutions is to add the required properties as the last lines in the Alert Description field:

Visual Studio Authoring Extensions | Specify Alert description

If you look into the generated XML (the .mptg.mpx file) you can see that the Alert Parameters have been added: