I'm not here to defend AWS but I'm a bit puzzled by your comment about the Boto3 doco. Here's some sample usage for instance which clearly is something more than "automatically generated" https://boto3.amazonaws.com/v1/documentation/api/latest/guid... .
I believe they meant that the API bindings themselves are autogenerated - which I think is pretty likely given how baffling and un-pythonic some of decisions in boto3 are.
You're right that much of the documentation clearly isn't auto-generated. Of the many Amazon APIs and tools I've worked with, boto3 among the better of them in terms of documentation.
Not the docs, the library code is (for the most part) automatically generated
This is actually a good example of how the thing works, you have to use MessageBody as an argument name to send the message. Or use the Entries argument
Those names and that usage style are far from Pythonic
