API 2.0 Get Custom Values -> Values -> Description

I would like to get the data that exists in RT Custom Values → Values → Description.

When I use this code (6 being the id of the custom field I am working with), I get a list of the “Values” which lists the “Name” part of the Value, is there a way to retrieve the “Description” part of the Value?

$avar = "https://myrt.url/REST/2.0/customfield/6/";
curl_setopt($ch, CURLOPT_URL, $avar);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");        
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);    
$result = curl_exec($ch);    
echo "<pre>";
echo "</pre>";
curl_close ($ch);

The output looks like this (just showing the relevant part):

“Values” : [

Those “Values” are the “Name” part of the Custom Field. I need the “Description” part of the Custom field.

For example, in RT when I look at the Custom Field I see something like this:
Sort. Name Description
0 none No Value Chosen Yet

  1. abbott      Abbott Hall


I would like my code to return the description: Abbott Hall, rather than the name: abbott.

I don’t need the exact PHP code for this, just a general sense of how to get all the Descriptions for my Custom Field rather than all the Names.

Thanks for any help you can give with this.