8 tools with consistent naming (db_* prefix), comprehensive descriptions (150-250 chars each), and complete JSON Schema input definitions. All parameters typed and described. Output schemas documented in descriptions. Strong adherence to patterns:tool and pattern:constrained-input (enums for format/products). Key gaps: no explicit error recovery guidance in descriptions, no per-tool permission scopes declared, output field naming not fully documented (e.g., what fields does db_journeys return?). Tool composition is sound, each tool has one responsibility. Descriptions are LLM-optimized and include prerequisites (e.g., 'Requires recon_token from db_journeys'). No secrets exposed as parameters. Rate limiting and timeout handling present server-side.

• Document output schemas formally. For each tool, add a 'Returns' section specifying JSON structure: e.g., db_journeys returns {journeys: [{id, from, to, departure, arrival, delay, recon_token, legs: [{journey_id, ...}]}], total_count}. This enables LLMs to extract and chain data correctly.
• Add error recovery guidance to descriptions. E.g., db_search_station: 'If no results, try a partial name or EVA number. If still empty, the station may not exist in the DB.' db_journeys: 'If no connections found, try a different time or check db_disruptions for service advisories.'
• Declare permission scopes in tool descriptions. Add a line like 'Scope: read:bahn-api' to each tool. This clarifies what the agent can do and supports audit logging.
• Document pagination for list-returning tools. Add to db_departures/db_arrivals/db_disruptions: 'Returns up to 50 results. Use offset/limit parameters to fetch more. Call with offset=50 to get the next batch.' Specify the actual limit in code.
• Add fallback suggestions to dependency errors. E.g., db_journey_offers description: 'If recon_token is missing or expired, call db_journeys again to get a fresh token.' This guides LLMs to self-correct without manual intervention.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry