Validation and context

the context of the conditions should be the one where the tours will run.
e.g. in 01_basic_add_and_publish_a_folder.cfg:

[amberjack]
steps =
    0_create-a-new-folder
    1_fill-out-the-fields
    2_publish-the-folder
    3_all-done
title = Add and publish a folder
validators =
    python: isNotCreated(context,'/myfolder')
    python: hasRole(context,request, 'Contributor')
    python: hasRole(context,request, 'Reviewer')

[0_create-a-new-folder]
blueprint = collective.amberjack.blueprints.step
text =
title = Create a new folder
url = /
microsteps =
   ...

you should:
1. get the first step's url (in this case '/')
2. apply it to the sandbox (so '/' or '/Members/john-smith/')
3. use it as context for the validators