Four tools with basic schemas and descriptions, but significant gaps in parameter documentation, error handling, and output schema clarity. Tool names follow verb_noun convention (list_features, send_message, update_message, respond_to_url), which is good. However, descriptions are minimal (10-50 chars), parameter descriptions are sparse or missing, and no output schemas are documented. No error handling guidance, no idempotency hints, and no security/permission documentation. The tools lack the depth needed for reliable LLM selection and error recovery.

• Add output schema documentation for each tool. E.g., send_message should document: {message_ts: string, channel_id: string, timestamp: string}. This enables chaining to update_message.
• Expand tool descriptions to 100-200 chars. Include WHEN to use each tool: 'Sends a message to a Slack channel and returns the message timestamp. Use this for initial messages; use respond_to_url for interaction responses.'
• Add parameter descriptions with format/constraint hints. E.g., channel_id: 'Slack channel ID (e.g., C1234567890). Can be a channel name prefixed with # or a channel ID.'
• Document error cases and recovery paths. E.g., 'If channel_id is invalid, error will be "channel_not_found". Try list_channels() to find the correct ID.'
• Add idempotency hints to update_message and respond_to_url. E.g., 'This operation is idempotent, calling with the same timestamp and text is safe to retry.'