Changing or viewing remote computer’s description, name and other options related to Win32_WmiObject and class Win32_OperatingSystem is relatively easy with powershell. Just type in new script in PoweShell ISE or in notepad and save it as .ps1 file.

$OSValues = Get-WmiObject -Class Win32_OperatingSystem -ComputerName "remote_computer_name"
$OSValues.Description = "remote_computer_description"
$OSValues.put()

You can as well display current description and other options by typing:

Get-WmiObject -Class Win32_OperatingSystem -ComputerName "remote_computer_name" | Select description

Full list of available options is here:

https://msdn.microsoft.com/en-us/library/windows/desktop/aa394239(v=vs.85).aspx

Solution based on:

https://social.technet.microsoft.com/Forums/en-US/a777f07c-f9be-4eb5-8788-de7e5c068411/changing-computer-descriptions-remotely-using-powershell?forum=winserverpowershell&prof=required