The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcVsanPortEp:licGP managed object property", so it carries no real prose -- but the property name and its Unsigned64 type tell you what it holds: It holds the remaining license grace-period, in days, for the licensed FC port feature this VSAN port endpoint is using. Fabric interconnect FC ports beyond the base license count run on a grace period, so this value on this VSAN port endpoint is the countdown an admin watches to know how many days remain before that specific port would be forcibly disabled if a permanent license is not installed. This VSAN port endpoint might currently show licGP 0, meaning 0 days remain in its grace period before it needs a real license to stay usable.