This Management Pack discovers Microsoft SQL Server 2008 Reporting Services (Native Mode) and related objects. The management pack only contains the discovery logic and requires the separate monitoring management pack to be imported to monitor the discovered objects.
The Microsoft SQL Server 2008 Reporting Services (Discovery, Native Mode) Management Pack provides the SQL Server 2008 specific object definitions and discovery rules. It does not provide monitoring functionality, which is only contained in the SQL Server 2008 (Monitoring, Native Mode) Management Pack.