%%{init: {'theme': 'neutral' } }%%
sequenceDiagram

    participant master
    participant agent
    participant workspace

    master ->> agent: Create a Foo
    agent ->> workspace: (creates Foo, with Bar)
    workspace ->> master:
    master ->> agent: ok but never use a Bar
    agent --> agent: i must not allow master to see a Bar in the future
    agent ->> workspace: (obfuscates Bar)
    workspace ->> master:
    master ->> agent: good, i dont see a Bar
    master --> workspace: