What are the best practices for rate limits for retrieving sensitivity labels in Graph API?

Question

We noticed that we would need to do an extra API call per driveItem to retrieve sensitivity labels for each item via https://learn.microsoft.com/en-us/graph/api/driveitem-extractsensitivitylabels?view=graph-rest-beta&tabs=http. Would this count as a "permission" call or another resource type when considering the resource limits in https://learn.microsoft.com/en-us/sharepoint/dev/general-development/how-to-avoid-getting-throttled-or-blocked-in-sharepoint-online#application-throttling?

Additionally, is there any way for us to retrieve sensitivity labels as a property in an existing permissions or /item retrieval call to optimize for API call resource costs?