Extension:ExplicitDescription

The ExplicitDescription extension generates the META  tag based on your definition. The extension includes the interface for pointing to the associated description page upon editing pages. Talk pages are ignored.

Usage
Once the extension is installed, simply edit any page in any namespace and you'll get a box pointing to the article's description page (e.g. MediaWiki:Desc-0-Foo would be the description page for foo). Conversely, editing the description page shows a box pointing back to the associated article.

Known issue: Fatal error: Call to undefined function wfLoadExtensionMessages in /var/www/test18/w/extensions/ExplicitDescription/ExplicitDescription.php on line 52
Get rid of this line from ExplicitDescription.php: