Update functions.json

functions.json

@@ -12,7 +12,8 @@
         }
       },
       "required": ["PID"]
-    }
+    },
+    "example_usage": "```tool_code\nget_product_name_by_PID(PID=\"807ZPKBL9V\")\n```"
   },
   {
     "name": "get_stock_price",
@@ -27,6 +28,7 @@
         }
       },
       "required": ["ticker"]
-    }
+    },
+    "example_usage": "```tool_code\nget_stock_price(ticker=\"AAPL\")\n```"
   }
 ]