TYPO3 Core

I want to use the description property for TCA type "slug" in an own extension, but it is not shown. Example code:

'path_segment' => [
    'label' => 'Path segment',
    'description' => 'Description of path segment',
    'config' => [
        'type' => 'slug',
        'generatorOptions' => [
            'fields' => ['title'],
            'fieldSeparator' => '/',
            'prefixParentPageSlug' => false,
        ],
        'fallbackCharacter' => '-',
        'eval' => 'uniqueInPid',
    ],
],

I want to give the editors some hints about the usage (e.g. not to change it without using a redirect from the old site), so a description would be very helpful.