Three tools with clear verb-noun naming (list_feeds, read_feed, fetch_feed) and reasonable descriptions (100-150 chars). All tools have input schemas with type definitions and required fields properly declared. However, parameter descriptions lack actionable constraints (no enums, ranges, or format specs). Output schemas are completely undocumented, LLMs cannot infer what fields to expect from responses. Error handling is absent from visible code. No tool annotations (readOnlyHint, idempotentHint). Parameter 'limit' lacks min/max bounds despite accepting 1-50 range.

• Document output schema for each tool. Example for read_feed: 'Returns {items: [{title: string, link: string, published: ISO8601, summary: string}], total: number, limit: number}'.
• Add min/max constraints to 'limit' parameter: {type: 'number', minimum: 1, maximum: 50, default: 20} in schema, plus description: 'Max items to return (1-50, default 20).'
• Specify matching behavior for 'query' parameter: 'Keyword filter (case-insensitive substring match) over item title/summary.' Clarify if regex is supported.
• Add error handling examples in tool descriptions: 'If feed URL is unreachable, returns error with fallback proxy URL. If feed format is invalid, returns empty items array with error message.'
• Declare tool annotations in schema: add 'readOnlyHint: true' and 'idempotentHint: true' to all three tools to signal retry safety to agents.