Well, in my brain… I’m one of the developers 
The only trick is accessing the meta data. Possible keys are currently kMDItemTitle, kMDItemHeadline, kMDItemSubject, kMDItemDescription, kMDItemCopyright, kMDItemComment, kMDItemURL, kMDItemKeywords, kMDItemCreator, kMDItemProducer, kMDItemAuthors, kMDItemAuthorEmailAddresses, kMDItemRecipients, kMDItemRecipientEmailAddresses, kMDItemEmailAddresses, kMDItemAlbum, kMDItemComposer, kMDItemContributors, kMDItemPublishers, kMDItemEditors and kMDItemOrganizations.
I’ll add this to the description of the script suite.