GetGyroscopeTool
Reads the TYPE_GYROSCOPE sensor (x/y/z angular rate in rad/s). No permissions. With duration_ms (1-5000) it collects a series of samples; otherwise a single reading. See readSensor. Output: latest x, y, z, accuracy, timestamp, plus a readings list of {x,y,z,timestamp}. Returns ToolResult.error when the device has no gyroscope.