I'm running into a similar situation such that DESCRIBE <table> on a table in UC works fine but running DESCRIBE EXTENDED <table> on that same table gives me that same error from a databricks notebook.

Strangely, I don't get this error if I switch the notebook to instead use a Serverless SQL Warehouse, and not a personal cluster compute.

So, I personally definitely have whatever access is needed, but somehow this compute instance does not have access to just the extended properties?

ExecutionException: org.apache.spark.sql.AnalysisException: 403: Your token is missing the required scopes for this endpoint.