McpGoogleDrive has 5 tools with basic descriptions and minimal parameter documentation. Tool names follow verb_noun convention (listFiles, getFile, searchFiles, createFolder, exportPdf), which is good. However, descriptions are generic (34-52 chars, below the 50-200 char baseline for LLM optimization). Parameter schemas are present but lack depth: most parameters have only type and description, with no enums, constraints, ranges, or validation guidance. Output schemas are not documented. Error handling is absent, no recovery guidance, categorization, or actionable error messages. The server exposes Google Drive operations but does not guide LLMs on when to use each tool or how to chain them. No pagination guidance despite listFiles accepting pageSize. No security documentation (credentials, permissions, audit trails). Composition is reasonable (5 focused tools), but missing idempotency hints and chaining metadata.

• Expand each tool description to 80-150 chars. Include WHAT it does, WHEN to use it (vs. similar tools), and any prerequisites. E.g., 'Search for files by name query. Use this to find a specific file when you know its name; use listFiles to browse all files. Returns file metadata including ID, name, and MIME type.'
• Document output schemas for all tools. Specify returned fields (fileId, name, mimeType, createdTime, etc.), types, and which fields are needed for downstream tool calls. E.g., listFiles must return fileId so getFile can be called next.
• Add parameter constraints: pageSize range (1-1000), query string length limits, folderName character restrictions. Include validation rules in descriptions: 'pageSize: integer, 1-1000, default 10'.
• Implement structured error responses with recovery guidance. E.g., 'File not found (404). Try searchFiles() with a partial name, or listFiles() to browse available files.' Categorize errors as retryable, user-fixable, or fatal.
• Add security documentation: explain how Google Drive API credentials are injected (environment variables, service account file), what permissions each tool requires (read:drive, write:drive), and audit trail capability.