Windows 7 How to Rename Win 7 Restore Point

I created a restore point but fatfingered the description and it's bugging me. I want to rename it (the text in the "description" column of the restore point). I know restore points are in the System Volume folder and I deprotected the one for the C:\ volume to the extent I could and tried to recursively grep it in an administrator shell but many files were still "permission denied". Anyone know the exact files where the descriptions of the restore points are located? (I searched the registry without luck, so I assume they're in that directory with the actual data from the restore point.)