What is assistantd?

Ever since I upgraded to OS X Mountain Lion and installed OS X Server, I keep getting prompts for my Keychain password from a process called assistantd. I'm pretty sure that it's an OS X process, but don't want to give access to my keychain to just any process.

So, my ultimate question is: does anyone know what assistantd is and why it would need access to my keychain?

Solution 1:

According to this site, Ongoing Cross-Section of assistantd Headers - Useful for Siri Mods, it appears assistantd is associated with Siri functionality on iOS.

Given this, I suspect assistantd on Mac OS X is related to the new dictation functionality. Dictation on Mac OS X 10.8 uses Contacts and other personal information to improve accuracy; gaining access to this information would explain the need for Keychain access.