I was really excited when Apple announced to add tag support to Finder with OS X 10.9 Mavericks. But after installing the OS update and playing with the new tag feature, I was a bit disappointed on how the feature was implemented. There was neither a command line utility to manage tags nor was there a way to do this with AppleScript. – At least, I did not find a proper solution. So, to add/remove tags to/from a file or folder one had to open the info dialog (⌘+I) and modify the tags in the new input field at the top.
Good work by Marko Kästner. Mavericks' Finder can be slow at searching or adding tags for power users; Marko's workflow is nicely integrated with Alfred and it can be activated with a keyboard shortcut.