23 tools with consistent verb-noun naming (list_, get_, create_, post_, etc.). All tools have descriptions (avg ~80 chars, within baseline 34-392). Input schemas present with type definitions and parameter descriptions. However, output schemas are not documented, LLMs cannot predict response structure for chaining. Error handling is minimal; no recovery guidance or actionable error messages visible. Missing tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk classifications. Parameter descriptions are adequate but lack format constraints (e.g., no enum for channel types, no regex for timestamps). No pagination metadata (total_count, next_cursor) visible in list tools.

• Document output schemas for all tools. E.g., 'Returns: {channels: [{id: string, name: string, is_private: bool, created: ISO8601}], total_count: int, next_cursor?: string}'. This enables LLM chaining.
• Add tool annotations to FastMCP registration. Mark delete_message, archive_channel, create_channel as destructiveHint=true or idempotentHint=true. Expose via MCP protocol so agents know which calls are safe to retry.
• Convert free-form parameter descriptions to enums where applicable. E.g., types: enum ['public_channel', 'private_channel', 'mpim', 'im']; sort: enum ['timestamp', 'relevance']. Prevents hallucinated values.
• Add pagination metadata to list/search responses. Include 'total_count' and 'next_cursor' in output schema. Document in tool description: 'Returns up to 100 results; use next_cursor to fetch more.'
• Enhance error messages with recovery hints. E.g., 'Channel not found. Try list_channels() to see available channels.' or 'User not found. Try search_users() with a partial name.' This guides agent retry logic.