Server has 6 tools with basic schemas and descriptions, but significant gaps limit production readiness. All tools have input schemas with type definitions and descriptions present, but descriptions are minimal (10-60 chars, well below the 50-200 char baseline for A-grade tools). No output schemas documented. Error handling returns raw error messages without recovery guidance. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Tool names follow verb_noun pattern (get-*, clan-war-league-*) but lack clarity on distinctions (e.g., 'clan-war-league-info' vs 'clan-war-league-war' are not obviously different). Parameters are sparse and lack constraints (e.g., 'round' accepts 1-7 but no enum or range validation visible in schema). No pagination support despite API returning lists. Responses dump raw JSON without field documentation.

• Expand tool descriptions to 80-150 chars. Example: 'get-player' → 'Retrieve detailed player profile including level, troops, spells, and war statistics. Use this to check a player's current state before planning attacks or analyzing war performance.'
• Document output schemas explicitly. Define what fields each tool returns (e.g., player returns {tag, name, level, trophies, troops[], spells[]}). Include these in tool registration or a separate schema doc.
• Add recovery guidance to error messages. Example: 'Player tag not found. Verify the tag format (e.g., #ABC123) or use search_players() if you only have a name.'
• Use z.enum() for 'round' parameter: z.number().int().min(1).max(7).describe('CWL round number (1-7)'). Add validation in handler to reject out-of-range values with actionable error.
• Add readOnlyHint: true to all tool schemas to signal to agents that these operations are safe to retry without side effects.