Use before live train queries to see which read-only capabilities are configured and why unavailable capabilities are disabled.

Use this before search_trains whenever no canonical station ID is known. Returns candidates for Japanese, English, and common romanized names without silently resolving ambiguous inputs such as Osaka or Fukuoka.

Use after resolving both station IDs. Searches direct Shinkansen services only, never transfer journeys. Requires an explicit date; optional time, service, and operator filters are applied before pagination.

Use with the opaque trainId returned by search_trains to retrieve that service and its ordered stops. Do not construct train IDs manually.

Use only to check whether the configured provider exposes seat inventory for an exact train and station pair. The default provider returns an explicit unsupported status and never fabricates inventory.

Use to sort structured direct-train candidates by departure, arrival, duration, or total fare. This tool does not make a subjective recommendation.

Use for routes that may include transfers, not for an individual train. The Shinkansen-first v0.1 provider reports this capability as unsupported rather than returning direct trains under the wrong concept.