Property-less objects (`{ type: "object" }`, `properties: {}`) were being
collapsed to a strict empty object by the Zod converter and given an implicit
`additionalProperties: false` by the Effect converter, so valid free-form
payloads such as METABASE_POST_API_CARD.dataset_query were rejected at the CLI
boundary. `ToolSchema.parse` separately dropped root `patternProperties` and
rejected a schema-valued root `additionalProperties`.
Dynamic keys are now routed to exactly the schemas that apply to them, and the
shared acceptance contract lives in one checked-in corpus with byte-identical
TypeScript and Python copies.
jkomyno