Not quite. The exclave communicates with the OS via what I'll call a World Information Interface (WII). Like an API, the WII define a fixed set of function calls which will return a response.
Say the OS wants to know how many people are in a room. The OS will call the WII.numPeopleInRoom() function. The exclave is free to use whatever sensor data is necessary to return an accurate number; it might use a camera, microphone, a touchscreen, or sensor fusion. Regardless, the OS is given no information about what sensor data was used to arrive at that result. The key piece is that the OS may only acquire information that is provided by the exclave.
Say the OS wants to know how many people are in a room. The OS will call the WII.numPeopleInRoom() function. The exclave is free to use whatever sensor data is necessary to return an accurate number; it might use a camera, microphone, a touchscreen, or sensor fusion. Regardless, the OS is given no information about what sensor data was used to arrive at that result. The key piece is that the OS may only acquire information that is provided by the exclave.