get a gimmebar collection and render

gimme_bar_collection.php

<?php
function url_get_contents ($Url) {
    if (!function_exists('curl_init')){
        die('CURL is not installed!');
    }
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $Url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $output = curl_exec($ch);
    curl_close($ch);
    return $output;
}

// $json contains the data you want
$json = url_get_contents("https://gimmebar.com/api/v1/public/assets/itschrisburton/typography.json?limit=50");
$json_output = json_decode( $json );

foreach ( $json_output->records as $r )
{
    ?>
        <img class="img clearfix" src="<?php echo $r->content->resized_images->stash->url?>"
            alt="<?php echo $r->title?>"
            <?php if (isset($r->content->resized_images->stash->dims)): ?>
                height="<?php echo $r->content->resized_images->stash->dims->h?>"
                width="<?php echo $r->content->resized_images->stash->dims->w?>" />
            <?php endif;?>
        <?php if (filter_var($r->source, FILTER_VALIDATE_URL)):?>
        <div><a href="<?php echo filter_var($r->source, FILTER_SANITIZE_URL)?>">Source</a></div>
        <?php endif; ?>
    <?php
}

?>
<pre>
<?php print_r($json_output); ?>
</pre>

I'm really glad I found this! I'm just learning the basics of grabbing API data so forgive me if this is really obvious... but I can't seem to get asset descriptions using this call. I've tried adding on an &_include[]=description but I get the feeling it isn't that easy. Do you mind helping me out?