All of the sdks support client side monitoring (CSM), so these sort of tools can be built client side. https://boto3.amazonaws.com/v1/documentation/api/1.10.46/gui...

afaics the only challenge is mapping some of the apis to iam as its only 85% 1:1

There's also tools for helping with iam like (generator, and linter)

https://github.com/salesforce/policy_sentry

https://github.com/duo-labs/parliament