Discord MCP server has basic tool definitions with descriptions and schemas present, but exhibits several quality gaps. All 4 tools have descriptions (meeting the baseline minimum), and input schemas are visible. However, descriptions are moderately detailed but lack explicit guidance on when to use each tool, error recovery, and prerequisites. Parameter descriptions are adequate but inconsistent. Output schemas are not documented, tools return string confirmations or error messages rather than structured objects. Error handling is present in implementation but not described in tool specs. The server has appropriate separation of concerns (register_discord_bot, send_message, get_channel_messages, get_bot_id) and names follow verb_noun convention. No critical security gaps visible in tool definitions (secrets are not exposed as parameters), but audit logging is not addressed in the rubric requirements.

• Document output schemas for all tools. E.g., register_discord_bot should return {"bot_id": "<string>", "status": "ready"} so LLMs know the structure. send_message should return {"success": true, "channel_id": "<string>", "message_id": "<string>"} to enable chaining.
• Add explicit range constraints to get_channel_messages. Change description to: 'The maximum number of most recent messages to retrieve (1 - 100, default 10)' so LLMs know the bounds.
• Clarify the distinction between register_discord_bot and get_bot_id in their descriptions. E.g., register_discord_bot: 'Registers and starts a new Discord bot client. Call this once per unique bot token to initialize it.' get_bot_id: 'Returns the bot ID without starting the client. Use this to verify a token without connecting the bot to Discord.'
• Add recovery guidance to tool descriptions. E.g., send_message: 'If the bot lacks permission, the error will indicate insufficient permissions, in that case, verify the bot role in the Discord server or ask the user to grant the bot send permissions.'
• Implement structured error responses. Modify send_message and get_channel_messages to return {"success": false, "error": "...", "error_type": "retryable|user_fixable|fatal", "suggested_action": "..."} instead of plain error strings.
• Add pagination support to get_channel_messages (accept offset/page and limit parameters, return total_count and next_offset) to handle large message histories without blowing context.
• Document that bot_token, bot_id, and channel_id are Discord snowflake IDs and should be strings (not integers) to preserve precision.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry