Actually this will not be only RCDC but you will have to work on some workflow as well ... and at the end you might not achieve this.
Approve \ reject action is not executed against request itself but against approval request. So even if you will be able to provide the description it will be stored on approval request but not on a request object. TO make it visible to other approves you
will have to copy it on request or do a trickery to allow them to see other approval requests and pull it in single RCDC.
Standard FIM portal functionality IMO will not allow you to do this - if you need it I would go into a custom UI option to provide this functionality. Actually in one of last projects we went this path and even a bit further (custom request \ approval objects
for some of functionality with approvals \ escalation triggered with policies in FIM Service).
Limitation here is portal UI
Tomek Onyszko, memberOf Predica FIM Team (http://www.predica.pl), IdAM knowledge provider @ http://blog.predica.pl
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