Warforged can have an interrgrated tool, can this tool be a vehicle?

In Wayfinders guide to Eberron, envoy warforged can have an interrgrated tool, can this tool be a vehicle? Nope! Only the tools *specified* on page 154 of the PHB. But hey, if your DM allows it…

— Keith Baker (@HellcowKeith) July 26, 2018