28 tools with consistent naming (verb_noun pattern) and complete input schemas. Descriptions are present but generic, most are 40-80 chars, below the 194-char baseline for A+ tools. Parameter descriptions are minimal (10-30 chars), lacking actionable constraints, format hints, and dependency documentation. Output schemas are not documented. Error handling is absent from tool definitions. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Security-critical tools (send_message, delete_file, share_file) lack confirmation or dry-run patterns. Composition is sound, tools are single-responsibility and chainable via IDs.

• Add output schema documentation to every tool. Specify return type (object/array), required fields, and field types. E.g., gmail_search_messages returns {messages: [{id: string, from: string, subject: string, date: string}], totalResults: number}.
• Expand parameter descriptions to 50-100 chars with format hints and constraints. E.g., 'query: Gmail search query using operators (from:, subject:, has:attachment, is:unread). Example: "from:[email protected] subject:invoice"'.
• Add tool annotations: mark read-only tools with readOnlyHint=true, destructive tools with destructiveHint=true, and idempotent tools with idempotentHint=true.
• Implement confirmation pattern for destructive tools. Add a 'confirm' boolean parameter (default false) or a separate 'confirm_delete_*' tool that requires explicit approval.
• Document error handling in tool descriptions. E.g., 'Returns error if message not found (404). Try gmail_search_messages to verify the message exists first.'

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry