Momento MCP has clear tool names (get, set, list-caches, create-cache, delete-cache, publish) that follow verb_noun conventions. All 6 tools have descriptions and visible Zod schemas with typed parameters. However, descriptions are minimal (10-60 chars), lacking context on WHEN to use each tool or what happens on error. Parameter descriptions exist but are generic. Output schemas are not documented, responses are hardcoded text strings without structured field definitions. Error handling returns status strings but no recovery guidance. No tool annotations (readOnlyHint, destructiveHint) despite clear risk levels (READ_ONLY, WRITE, DESTRUCTIVE). Missing idempotency guidance for retry-safe operations.

• Expand tool descriptions to 50-200 chars. Example: 'get: Retrieve a value from the cache by key. Returns the value on hit, or a miss status if not found. Use list-caches first to discover available caches.'
• Document output schemas explicitly. Define response objects with typed fields: {status: 'HIT'|'MISS'|'ERROR', value?: string, message?: string, caches?: string[]}. This enables LLM parsing and chaining.
• Add tool annotations to mcpServer.tool() calls: readOnlyHint for get/list-caches, destructiveHint for delete-cache, idempotentHint for get/list-caches. Agents will respect these hints for retry logic.
• Enhance error responses with recovery guidance. Instead of 'Status: ERROR\nDetails: ...', return {status: 'ERROR', message: 'Cache not found', suggestion: 'Call list-caches to see available caches', retryable: false}.
• Add a confirm_delete_cache tool or require a confirmation parameter (e.g., confirmed: boolean) for delete-cache to prevent accidental destruction.