A suggestion to add a new attribute to the <intent> registration markup

Hi,

I presented Web Intents to my fellows. They made a suggestion which I think
very useful.

Is it possible to add a new *optional* attribute to the <intent> tag (maybe
named *description*) which can help the user get some information about the
service or app he is gonna add? This attribute maybe refer to a page with
instructions or a video or some pictures helping the user to be familiar
with what the service does. I think the user can facilitate the information
to decide whether to add the service or not.

Thanks