Action schemas for the scripts tool. The notes surface through the help
tool and are the worker-facing contract: what a run costs, what acceptance
means, and why describe is the call to make before run.
info's name carries an enum, where the references tool's source
deliberately carries none: that vocabulary is runtime data, this one is the
curated list YmerNode.Scripts.PackageDocs compiles, so the schema reads it
from there and cannot drift from what the action accepts.