Periodically, I'm seeing this keychain dialog pop up:

I click 'Cancel', then it pops up again, then I click 'Cancel' again, and it goes away for a while. (Maybe an hour or two, I haven't timed it.) I haven't noticed anything not working right.
What's going on here?
If it matters, this is OS X 10.8.2.

accountsdis a part of the Accounts Framework. It is probably normal for it to want access to your keychain. Apart from that I don't have a clue, but see the answer below. – Harald Hanche-Olsen Jan 28 '13 at 16:25assistantdsince upgrading to Sierra. – benc Dec 11 '18 at 22:56*d(daemon), I'm 99% sure that it isn't meant to be shown to the end user. – cubuspl42 Aug 12 '19 at 14:24