const fulfillment = await mcp.useTool('fulfillment_createShippingFulfillment', {
  order_id: '12-34567-89012',
  line_items: [
    {
      line_item_id: 'item1',
      quantity: 2
    }
  ],
  shipped_date: new Date().toISOString(),
  shipping_carrier_code: 'UPS',
  tracking_number: '1Z999AA10123456784'
});

console.log(`✅ Tracking uploaded: ${fulfillment.fulfillmentId}`);