Actually I personally would prefer it not to create the "Meta Tag" but just a way for it to insert only the exact text typed into the editor - w/o "div onclick=" it inserts now.
Then it could be very diverse. I just create the meta tag area such as:
<meta name="description" content="
Insert PowerCMS code here
Or for PHP includes:
<?php include("PowerCMS content would appear here"); ?>
This would be very helpful for my sites!