The tool URL indicates the web address of the External Tool, and may contain additional information, such as the resource to show.
If you are unsure what to enter for the tool URL, please check with the tool provider for more information.

You can enter a cartridge URL if you have one, and the rest of the form details will fill automatically.

If you have selected a preconfigured tool, you may not need to enter a tool URL. If the tool link is used to just launch
into the tool provider's system, and not go to a specific resource, this will likely be the case.