Espionage In Miniature

Jake Barrada worked as an undercover intelligence agent in a super-+secret government organization called The Bureau of Research and Information Acquisition or BRIA.
Now Jake had assignment that was unlike any of his previous missions. The mission objective was a building in a remote Upstate wooded area. American intelligence sources suspected that the building was the headquarters of a terrorist organization. The building was an impenetrable fortress and no one could get in or out without being detected.
The masterminds in the BRIA organization designed a machine that could reduce Jake to the size of a rat. As a miniature man he would fly onto the roof of the enemy fortress on a drone and make his way down the HVAC duct into the interior of the building. Once inside, he would penetrate the large computer and install listening bugs and transmitter devices into the circuitry then get out without being discovered.
The plan looked foolproof on paper, but what would happen when Jake actually tried to execute it?