GetCurrentLocationTool
Returns the device's last known cached location from android.location.LocationManager (no fresh fix is requested). Requires ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION. Accepts an accuracy param ("fine" | "coarse", default "coarse") that only reorders the provider preference (GPS/network/fused). Output: latitude, longitude, accuracy_meters, altitude, speed_mps, timestamp, provider. Returns ToolResult.error when permission is missing, the accuracy value is invalid, or no cached fix exists on any enabled provider.