Each tool has a clearly stated, distinct role: enumerate groups, incrementally fetch messages, keyword-search messages, and export media files. The only mild overlap is between fetch_messages and search_messages since both return message data, but the descriptions distinguish retrieval by cursor/time window versus by keyword, so misselection is unlikely.

All four tools follow one predictable pattern: the whatsapp_ namespace prefix plus a verb_noun form (list_groups, fetch_messages, search_messages, export_media). No camelCase mixing or inconsistent verb styles.

Four tools is lean but defensible for a focused, mostly read-only local WhatsApp group extraction server. It is on the thin side—no separate tool for group details or contact lookup—but each tool earns its place with no redundancy.

The core read/export lifecycle is covered end to end: discover groups, pull messages by cursor or time, search across groups, and export attachments with resolvable paths. Gaps exist around individual/DM chats, sending or replying, and standalone group member/contact details, though these may be intentional scope limits.