Inspect a capability — get full schema, auth, and parameters before calling

Returns everything needed to call an operation or workflow: resolved parameter schema (all $refs inlined), response schema, auth translated to concrete header instructions, API context (name, description, tag descriptions), and HATEOAS _links (execute, upstream).

Capability id format: METHOD/host/path — e.g. GET/api.stripe.com/v1/customers or POST/{jentic_hostname}/workflows/summarise-latest-topics. Pass ?toolkit_id=... to check whether credentials are configured for that toolkit. Accept: text/markdown returns a compact LLM-friendly format. Accept: application/openapi+yaml returns the raw OpenAPI operation snippet.