As part of putting automation on top of the Azure SDK for Python, I found one of the missing pieces of information in the object metadata is the naming rules, for example maximum name length, allowed naming pattern. This information is in the documentation, but not present in the generated code. It would be really nice if the autorest-ed classes could add to validation, for example here is a mocked up example from class Subnet with "name" content and length rules (I made up the content, it is not based on any actual documentation):

      _validation = {
          'etag': {'readonly': True},
          'name': {'max_length': 64, 'regex': ...},
          'private_endpoints': {'readonly': True},
          'ip_configurations': {'readonly': True},
          'ip_configuration_profiles': {'readonly': True},
          'resource_navigation_links': {'readonly': True},
          'service_association_links': {'readonly': True},
          'purpose': {'readonly': True},
          'provisioning_state': {'readonly': True},
      }

One reason I would like this is to automatically compress and disambiguate names to improve automation success. For example, some objects have a max name length of 64, some 80, some 16. The process of fixing up those names to conform is much easier if the SDK advertises what the naming rules are. And yes, even if this is in a "private" variable, it's still incredibly useful to consume for automation.