Update Document Description of multiple documents with different values

I need to update value in Document Description attribute of multiple documents. Each document description value is different so I want  to use a PowerShell Script using Update-PWDocumentProperties. Can someone help me to create PowerShell script to update document Description of multiple documents when description value is different for each document.

I have tried to use following script but it is not updating the Document description even I am not getting any error.

$Objects = import-csv “C:\UpdateAttributes.csv” –header doc1,Description -delimiter '|'

ForEach ($Object in $Objects){

$doc1 = $($Object.doc1)

$Description = $($Object.Description)

$doc = Get-PWDocumentsBySearch -FolderPath "Projects\Project_TEST\800 Training\TEST" -DocumentName $doc1

Update-PWDocumentProperties -InputDocument $doc

Get-PWDocumentsBySearch -FolderPath "Projects\Project_TEST\800 Training\TEST" | Foreach -MemberName $Description