The main purpose of a tool configuration is to set up a secure communication channel between Moodle and the tool provider.
It also provides an opportunity for configuration defaults and setting up additional services provided by the tool.

* **Automatic, based on Launch URL** - This setting should be used in almost all cases. Moodle will select the most appropriate tool configuration
       based on the Launch URL. Tools configured by both an administrator or within this course will be used.
       When the Launch URL is specified, Moodle will provide feedback on whether it recognizes it or not. If Moodle does not recognize the Launch URL,
       you may need to enter the tool configuration details manually.
* **A specific preconfigured tool** - By selecting a preconfigured tool, you can force Moodle to use that tool configuration when communicating with the
       external tool provider. If the Launch URL does not appear to belong to the tool provider, a warning will appear. In some cases, it is not necessary
       to enter a Launch URL when providing a specific preconfigured tool (if not launching to a particular resource within the tool provider).
* **Custom configuration** - To setup custom tool configuration on just this instance, show Advanced options, and enter the consumer key and
       shared secret yourself. If you do not have a consumer key and shared secret, you may be able to request them from the tool provider.
       Not all tools require a consumer key and shared secret, in which case the fields may be left blank.

### Preconfigured tool editing

Three icons are available after the preconfigured tool dropdown list:

* **Add** - Create a course level tool configuration. All External Tool instances in this course may use the tool configuration.
* **Edit** - Select a course level tool from the dropdown, then click this icon. The details of the tool configuration may be edited.
* **Delete** - Remove the selected course level tool.