Four well-named tools with clear, actionable descriptions (avg 180 chars). All tools have complete input schemas with typed properties and parameter descriptions. Naming follows verb_noun pattern (search_events, get_event, list_tags, list_categories). Descriptions explain WHAT, WHEN, and HOW to use each tool. However, output schemas are not documented, LLMs cannot predict response structure. Error handling is minimal (only 'Unknown tool' and 'No event found' cases visible). No pagination metadata guidance in descriptions. Missing tool annotations (readOnlyHint, idempotentHint). Parameter descriptions are good but lack explicit constraints (e.g., date format examples in 'after'/'before' are helpful but not formalized as patterns).

• Document output schemas for all tools. Add a 'returns' section to each tool description or include a JSON example showing {region, source, total_matching, page, count, events: [{id, date, title, link, slug, excerpt, tags, categories}]}.
• Add tool annotations to the McpToolDefinition interface: readOnlyHint: true for all four tools, idempotentHint: true. This signals to LLMs that these tools are safe to call repeatedly without side effects.
• Enhance error handling: validate date formats (ISO 8601) and return 'Invalid date format for after/before, use YYYY-MM-DD or YYYY-MM-DDTHH:mm:ss' instead of letting the API fail silently.
• Add pagination guidance to tags/categories descriptions: 'Results are sorted by usage (most popular first). If you need more results, increase per_page up to 50.' Clarify that these tools do not support pagination (no page param).
• Formalize parameter constraints in schema: add pattern: '^\d{4}-\d{2}-\d{2}' to after/before, add minimum: 1, maximum: 50 to per_page in all tools.