Some general advice of never forgetting to use up your inspiration points... +Int to a skill check is awesome for a face / gatherer type.
Item familar is a great feat, a sentient book that you can mind link to or something is basically a hidden camera. Alternatively some sort of spider, as a spider can hide and gather information, as well as set up webs to act like an alarm system.
Wall of eyes is a spell that conjures a permanent wall... of eyes... metamagiced with invisible spell then it's basically invisible CCTV. Scrolls, Wand, Eternal wand of Invisible Wall of eyes would become a very intricate web of CCTV very quickly...though you might scare the living hell out of anything with true seeing or see invisibility.
Comprehend Languages / Tongues - you cannot overhear rumours in a language you don't understand.
An Enigma machine, for writing coded messages, and perhaps giving a +2 to decipher script for deciphering coded messages.
Hat of disguise - for the rushed getaway / gathering information without being recognised.