[donavanm]

Character limits & the number of applied policies are all publicly documented https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_i.... Im not aware of any evaluation complexity limits and have never run in to that sort of problem in my ~10 years of dealing with IAM.

I expect you ran in to this sharp bit "You can add as many inline policies as you want to an IAM user, role, or group. But the total aggregate policy size (the sum size of all inline policies) per entity cannot exceed the following limits." Calculating the sum would be a pain as a user.

[p_l]

We didn't use inline policies much, but we had many policies linked across different objects, and the error message never pointed properly and we somehow didn't stumble upon the docs you mention (that's going into my notes :D).

I no longer work on that project, but it was considerable blocker when I was leaving as Sagemaker notebooks started randomly failing to start depending on role they were launched with.