How to display product description in Wish-list Opencart?

Question

PHP

I am adding a line

'description' => utf8_substr(strip_tags(html_entity_decode($result['description'], ENT_QUOTES, 'UTF-8')), 0, $this->config->get('config_product_description_length')) . '..',

in the controller and try to display like this:
<?php echo $product['description']; ?>
But I get an error:
Undefined index: description in
What am I doing wrong?