UpdateKeyDescriptionResponse

The following example updates the description of the specified KMS key.

To update the description of a KMS key

var client = new AmazonKeyManagementServiceClient();
var response = client.UpdateKeyDescription(new UpdateKeyDescriptionRequest 
{
    Description = "Example description that indicates the intended use of this KMS key.", // The updated description.
    KeyId = "1234abcd-12ab-34cd-56ef-1234567890ab" // The identifier of the KMS key whose description you are updating. You can use the key ID or the Amazon Resource Name (ARN) of the KMS key.
});