Strong naming conventions (all tools start with action verbs: yahoo_get_*, yahoo_search_*). Descriptions are clear and contextual (avg ~120 chars, well within 10-1024 range). Input schemas are properly defined with Zod, including type and description for each parameter. Key strength: parameter descriptions explicitly guide users on format and dependencies (e.g., 'League key in the form "<game>.l.<id>"'). Weakness: no output schemas documented, callers cannot see what fields to expect from responses. No error handling guidance in descriptions. All 10 tools follow consistent patterns, but lack of output documentation and error recovery guidance prevents higher scores.

• Document output schemas for all tools. Example for yahoo_get_my_games: 'Returns {games: [{game_key: string, game_name: string, season: number}]}'. This enables LLMs to chain calls and extract needed fields.
• Add error handling guidance to descriptions. Example: 'If league not found (404), try yahoo_get_my_leagues to verify the league key format. If token expired, re-run the authorize script.'
• Add pagination support to list-returning tools: add optional 'limit' (1-100, default 20) and 'offset' (default 0) parameters. Document max result count in description.
• Constrain yahoo_fantasy_raw_get path parameter with a regex pattern (e.g., '^/[a-z0-9/_-]+$') and document allowed prefixes in the description.
• Add a 'week' parameter to yahoo_get_league_transactions to filter by week, matching the pattern used in yahoo_get_scoreboard and yahoo_get_team_roster.