Request :: Add (meta)description to links in url field

Jeff $item->fields_by_key['key']->params->get('description')

should be

$item->fields_by_key['key']->params->get('core.description');

or

$item->fields_by_key['key']->params->get('params.description');

You can use editor like this one which allow markown. It cn very safeley paste texts copied from the web.

Jeff The description field (as part of the url field) needs to be protected from malicious input (javascript, php) and stripped from html. I also need an input limit set for the maximum amount of characters allowed.

In onPrepareSave you can go through $value array and clean all descriptions.

Jeff Nothing with $item->fields_by_key['key']->params->get('description')

So you have field in the form and it is saved? Try this. In field output template enter.

var_dump($this->value);

And see what you get. I hope you followed field name structure for your new field.