Server has 12 tools with complete input schemas and descriptions. Naming follows verb_noun convention (search_, list_, get_, send_, download_). Descriptions are present but brief (avg ~80 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 or dry-run support. Missing idempotency guidance for write operations.

• Document output schemas for all tools. Specify fields returned by list_messages (e.g., message_id, sender, content, timestamp, media_type) so LLMs can chain tools correctly.
• Add confirmation/dry-run support to send_message, send_file, send_audio_message. Implement a 'dry_run' boolean parameter or a separate 'preview_message' tool to let agents verify before sending.
• Add parameter constraints: limit (1 - 100), page (≥0), sort_by enum ('last_active'|'name'), before/after as ISO-8601 format strings with examples.
• Implement error handling with recovery guidance. Return structured errors: {error_code, message, recovery_action}. E.g., 'recipient_not_found: Try search_contacts() first' or 'send_failed_not_connected: Reconnect and retry'.
• Expand descriptions to 100 - 200 chars. Add WHEN to use each tool and dependencies. E.g., 'Get a single chat by JID. Use this after list_chats() returns a chat_jid, or if you already know the JID.'