for Sql server 2005, It was a bug when you modify maintainance plan you may get the error
“no description found” and you cannot edit the Maitainance plan.
problem could be the software you install is confilicting with sql server
to resolve this register following dll
regsvr32 msxml3.dll
regsvr32 msxml6.dll
Reference:
https://connect.microsoft.com/SQLServer/feedback/details/243850/ss2005-cannot-save-maintenance-plan-no-description-found-error?wa=wsignin1.0″
HTH
Vinay
Thanks! Microsoft SQL is SOOO hard to admin because of bugs like this!