Harry felt the Horcrux beating fast, faster than his own heart; It was an unpleasant, agitating sensation.
Harry knew that the thing inside it was agitated again.
The idea of the Deathly Hallows had taken possession of him, and he could not rest while agitating thoughts whirled through his mind: the wand, the stone, and the Cloak, if he could just possess them all… I open at the close…But what was the close?
There are no more uses of "agitate" in the book.
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Our goal is to agitate public unrest, so there will be a cry for change.