$title = trim($title);

$title = $address->getDiscountDescription();

$description = $address->getDiscountDescriptionArray(); //array();
foreach($this->_cards as $_id => $value){
    $description[$_id] = 'Gift Cards '.= $value['card_code'];
}

$description[$quote->getRuleId()] = $quote->getCouponCode();

$codes  = implode(",", $this->_cardCodes);
if(strlen($codes) && !strpos($title, 'Cards')){
    $title .= Mage::helper('giftcards')->__(' Gift Cards %s', $codes);
}

$title = trim($title);

$address->setDiscountDescription($title);
$address->setDiscountDescriptionArray($description);