I discovered that anyOf related errors can be very mistleading.

- jobs:  # must fail as correct is 'job'

Validating snippet above with https://github.com/pycontribs/zuul-lint/blob/master/zuul_lint/zuul-schema.json would fail with a misleading error:

'nodeset' is a required property

Failed validating 'required' in schema[0]:
    {'required': ['nodeset']}

On instance:
    {'jobs': {'name': 'foo'}}

That schema allows multiple value and nodeset happens to just one of several. As you can see what user gets is an erros that makes no sense for him.