Apple MCP has 8 tools with complete input schemas and descriptions, but significant gaps in parameter documentation and output schema specification. Most tools use operation-based dispatch (enum-gated), which is reasonable, but many parameters lack type constraints and detailed descriptions. No output schemas are documented. Error handling is not visible in the provided code. Tool names are generic (contacts, notes, mail) rather than verb-noun patterns (search_contacts, create_note). Parameter descriptions often state 'required for X operation' but lack format/constraint details. The server targets Apple platform automation with reasonable scope, but definition quality is below production baseline.

• Rename tools to verb_noun pattern: search_contacts, create_note, send_message, search_mail, create_reminder, search_calendar, search_maps. This enables LLMs to infer intent from names alone.
• Split operation-based tools into separate tools. Instead of 'notes' with operation enum, create search_notes, list_notes, create_note. Each tool does one thing; agents compose as needed.
• Document output schemas for every tool. E.g., search_contacts returns [{contact_id, name, phone, email}]. This enables LLMs to plan chained calls (e.g., get contact_id from search, then pass to another tool).
• Add min/max bounds and format constraints to numeric/string parameters. E.g., limit: 1-100 (default 20), scheduledTime: ISO 8601 format, dueDate: YYYY-MM-DD or ISO 8601.
• Add error recovery guidance in descriptions. E.g., 'If contact not found, try search_contacts() with a partial name.' This guides agents on retry strategies without wasting calls.