Passing arguments to menu item description in D7

Hi there,

I'm updating a 6.x module to 7.x. In the 6.x version, I had a menu item that had arguments to substitute in parts of the title and description sent to the t() function, a simplified version of which follows:

$items['menuitem1'] = array(
    'title' => t('@module management', array('@module' => MODULE_NAME)),
    'description' => t('View @module configuration', array('@module' => MODULE_NAME)),
    ...

According to http://api.drupal.org/api/function/hook_menu/7, in D7 the title field should now contain just the raw untranslated title string, which is then passed to the title callback function (t(), by default). You can specify additional arguments to pass to the title callback using the 'title arguments' property.
So, I can create the equivalent functionality as above for the menu title in D7 as follows:

$items['menuitem1'] = array(
    'title' => '@module management',
    'title arguments' => array('@module' => MODULE_NAME),

My question is, how do I do the same for the menu item description? Like the title, it seems that this must be specified as an untranslated string that will be sent to t() but, unlike title, there is no way to specify additional arguments to send - there is no 'description arguments'.

Any help gratefully appreciated!