Server has 12 tools with complete input schemas and descriptions. Naming follows verb_noun convention (search_, list_, get_, send_, download_). Descriptions are present but vary in quality (avg ~120 chars, below the 194-char baseline). Parameters are typed and described, but lack constraints (enums, ranges, patterns). Output schemas are not documented. Error handling is minimal, no recovery guidance or categorization. Security concern: send_message and send_file are destructive operations without confirmation patterns. Missing idempotency guidance for write operations.

• Document output schemas for all tools. Example: send_message should return {success: bool, message_id: string, timestamp: ISO8601, recipient: string}. This enables agents to reference sent messages later.
• Add enum constraints to 'sort_by' parameter in list_chats: enum=['last_active', 'name']. Add min/max bounds to 'limit' (1 - 100) and 'page' (0+) across all paginated tools.
• Implement confirmation pattern for send_* tools. Add optional 'dry_run' parameter or require explicit 'confirm=true' to prevent accidental message sends.
• Add error handling with recovery guidance. Example: 'Recipient not found. Try search_contacts() first to find the correct phone number or JID.' Categorize errors as retryable (network timeout) vs. user-fixable (invalid recipient).
• Enhance descriptions with dependency hints. E.g., send_message: 'If you only have a contact name, call search_contacts() first to get their phone number or JID. Recipient format: phone number (no +) or JID (e.g., [email protected]).'