Why does my LTI 1.1 external learning tool automatically add a gradebook item even though there i...

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I am supporting the integration of labs from Vocareum using the LTI 1.1 standard. So far we have used remote plugins to add labs. Our labs are ungraded by design and do not pass back any gradebook data. We want to simply add the content

 

We have added the tool via Remote plugins as a Quicklink (CIM), then added the tools as an external tool provider. Each time i select the CIM link it automatically adds an assessment item. We want to keep the LTI content and remove the gradebook item. Any advice on how to add LTI content without automatically adding the gradebook item?