Three well-named tools with clear, actionable descriptions (avg 156 chars). All tools have complete input schemas with required fields and type definitions. Naming follows verb_noun pattern (list_, read_, fetch_). However, parameter descriptions lack detail on constraints (e.g., 'limit' has no min/max guidance), output schemas are not documented, and error handling is minimal. No tool annotations (readOnlyHint, idempotentHint) despite all being read-only operations. Missing guidance on when to use fetch_feed vs read_feed.

• Add explicit output schema documentation to each tool. Example for read_feed: 'Returns {feed: {id, title, source}, via: string, total_matching: number, count: number, items: [{title, link, published?, summary?, author?, categories?, id?}]}'.
• Add minValue/maxValue to 'limit' parameter in JSON Schema (not just description). Change from {type: 'number', description: '...'} to {type: 'number', minimum: 1, maximum: 50, description: 'Max items (1-50, default 20)'}.
• Add readOnlyHint: true to all three tools in their definitions to signal idempotency and retry-safety to agents.
• Enhance error messages with recovery guidance. E.g., throw new Error(`Unknown feed "${args.feed}". Call list_feeds() to see valid ids.`) instead of generic message.
• Clarify fetch_feed vs read_feed in descriptions. Add: 'Use read_feed for curated security feeds (faster, normalized). Use fetch_feed for arbitrary RSS/Atom URLs or when curated feed is not available.'