The link below provides the instructions, "Right-click a tool or toolbox you created, and click Item Description. This will open the Item Description window, displaying the Description page." which does not work in ArcCatalog.
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001500000014000000.htm
This defect is closed as non-reproducible as the steps/data needed to reproduce this issue are no longer available. If your client has a reproducible case on a supported configuration, please work with a Tech Assist to reopen and edit this defect.