Server has 9 tools with complete input schemas and descriptions present for all tools and parameters. Naming follows verb_noun convention (list_, open_, read_, update_, create_, append_). However, descriptions are generic and lack LLM-optimization guidance. Parameter descriptions are minimal (10-30 chars typically). No output schemas documented. No error handling guidance. Missing tool annotations (readOnlyHint, destructiveHint). No pagination support for list operations. Lacks actionable error messages and recovery guidance.

• Add output schemas to all tools. Document return types as JSON Schema. E.g., create_spreadsheet should return {spreadsheet_id: string, title: string, url: string}. This enables tool chaining.
• Expand tool descriptions to 100-200 chars. Include WHEN to use, WHAT it returns, and any prerequisites. E.g., 'Open a spreadsheet by title or URL to access its worksheets. Returns spreadsheet_id for use in subsequent calls. If you only have a partial title, call list_spreadsheets first.'
• Add tool annotations: mark read_worksheet, list_worksheets, list_spreadsheets with readOnlyHint=true. Mark update_cell, update_range, append_row, create_spreadsheet, create_worksheet with destructiveHint=true. This prevents accidental retries of writes.
• Add error handling guidance to parameter descriptions. E.g., 'identifier: The title or URL of the spreadsheet. If not found, call list_spreadsheets to see available titles.' Include actionable recovery steps in error responses.
• Add pagination to list_spreadsheets and list_worksheets: accept limit (default 20, max 100) and offset parameters. Return total_count and next_offset. Document result limits in descriptions.

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

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