Helper tools are components of an application that help the application perform specific tasks. Installing helper tools are something application developers do to enable features like in-app updates, or features that might require System access beyond what was initially requested by the application during install.
Due to the additional access a helper tool may grant, Apple has not given MDM vendors a way to automatically approve helper tools and these prompts will need Admin consent. For normal updates of apps managed by Fleetsmith no additional consent will be needed, however your users may occasionally run into these helper tool installations which Fleetsmith cannot control.
Within the Fleetsmith Catalog the most common applications that will require Helper Tool installation are Slack and Visual Studio Code.