Update tool.py

tool.py

@@ -4,7 +4,7 @@ from typing import Optional
 class SimpleTool(Tool):
     name = "get_travel_duration"
     description = "Gets the travel time in car between two places."
-    inputs = {"start_location":{"type":"string","description":"the place from which you start your ride"},"destination_location":{"type":"string","description":"the place of arrival"},"transportation_mode":{"type":"string","nullable":True,"description":"The transportation mode, in 'driving', 'walking', 'bicycling', or 'transit'."}}
+    inputs = {"start_location":{"type":"string","description":"the place from which you start your ride"},"destination_location":{"type":"string","description":"the place of arrival"},"transportation_mode":{"type":"string","nullable":True,"description":"The transportation mode, in 'driving', 'walking', 'bicycling', or 'transit'. Defaults to 'driving'."}}
     output_type = "string"
 
     def forward(self, start_location: str, destination_location: str, transportation_mode: Optional[str] = None) -> str:
@@ -13,14 +13,14 @@ class SimpleTool(Tool):
         Args:
             start_location: the place from which you start your ride
             destination_location: the place of arrival
-            transportation_mode: The transportation mode, in 'driving', 'walking', 'bicycling', or 'transit'.
+            transportation_mode: The transportation mode, in 'driving', 'walking', 'bicycling', or 'transit'. Defaults to 'driving'.
         """
         import googlemaps
         import os
         from datetime import datetime
         gmaps = googlemaps.Client(os.getenv("GMAPS_API_KEY"))
         if transportation_mode is None:
-            transportation_mode = "transit"
+            transportation_mode = "driving"
         try:
             directions_result = gmaps.directions(
                 start_location,