Strong foundation with clear, well-structured tool definitions. All 5 tools have explicit schemas with typed properties and descriptions. Tool names follow verb_noun convention (search_, list_, dataset_). Descriptions are detailed (100-200 chars) and explain WHAT, WHEN, and dependencies. Multilingual handling is well-documented. However, output schemas are not formally documented, responses are inferred from code. Parameter descriptions could be more prescriptive about constraints (e.g., exact range for 'rows' and 'limit'). No error handling guidance or recovery patterns visible. Missing tool annotations (readOnlyHint, idempotentHint). No pagination metadata (total_count, next_cursor) documented in output.

• Add formal output schema documentation to each tool. Example: 'Returns: {count: number, results: [{id: string, title_en: string, notes_en: string, resources: [{url: string, format: string}]}]}'. This enables LLM planning.
• Enhance error messages with recovery guidance. Instead of 'opendata.swiss: 404 not found', return 'Dataset not found. Try search_datasets() with a keyword, or list_organizations() to find valid publishers.'
• Add JSON Schema minima/maxima to numeric parameters: rows: {type: 'number', minimum: 1, maximum: 1000, default: 25}, limit: {type: 'number', minimum: 1, maximum: 1000, default: 100}.
• Declare tool annotations in the McpToolDefinition interface: add readOnlyHint: true and idempotentHint: true to all tools. This signals to agents that these calls are safe to cache and retry.
• Document pagination strategy in search_datasets description: 'Use start/rows for offset-based paging. Returns total count; iterate until results.length < rows to reach end.'