ProcessWire: dynamically change field description

Add this hook to admin.php to override a field description on the fly.

					
wire()->addHookBefore('Inputfield::render', function(\ProcessWire\HookEvent $event) {

    // This prevents a “Method ProcessField::getPage does not exist or is not callable in this context” error on /setup/field/, etc
    if (\ProcessWire\wire()->process != 'ProcessPageEdit') return;

    $field = $event->object;

    if ($field->name == 'yourFieldNameGoesHere') {

        $description = 'Your description goes here';

        $field->set('description', $description);

    }

});