I'm not sure on how complicated this request would be (and it's kinda selfish) so feel free to deny it if isn't in the scope of this area.
I'd like a tool to update metadata on music, the genre of bands/albums to be specific, for music based on the information from http://metal-archives.com/
IE. Select a folder with the program and it searches the website and changes the genre to what it is listed as. In the case of multiple genres simply ignore anything after the first / and put Metal as the suffix. So, Power/Folk Metal would just be 'Power Metal'. In the case of multiple results for a band a drop down selection of the results. Asking for confirmation before saving the changes would probably be best.
If there is already something that can edit metadata with the information from that site delete/close this request.
Forgot to include idea in the title.