Solid foundation with clear verb-noun naming and comprehensive parameter schemas. All 8 tools have descriptions (avg 156 chars) and input schemas with typed properties. However, parameter descriptions are sparse or missing for several tools (e.g., get_file, read_file lack descriptions for file_id; create_file lacks descriptions for text_content/base64_content). Output schemas are not documented, LLMs cannot predict response structure. Error handling is absent from visible code. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk profiles. Composition is sound: each tool has one responsibility, and naming distinguishes tools well (list_files vs get_file vs read_file).

• Document output schemas for all 8 tools. Example for list_files: 'Returns {files: [{id, name, mimeType, createdTime, owners}], total_count: int}'. Include pagination fields (nextPageToken) if applicable.
• Add descriptions to all parameters. For file_id: 'Google Drive file or folder ID (alphanumeric string, e.g. "1a2b3c4d5e6f7g8h9i0j")'. For text_content: 'UTF-8 text content to upload. Mutually exclusive with base64_content.'
• Add tool annotations to inputSchema. Example for read_file: 'inputSchema: {..., "readOnlyHint": true}'. For create_file: 'destructiveHint: false, idempotentHint: false' (since duplicate uploads create new files).
• Implement error handling with recovery hints. Catch googleapiclient.errors.HttpError and return structured errors: {error: 'file_not_found', message: 'File ID "xyz" not found. Try list_files(query="name contains \"xyz\"") to search.'}
• Clarify mutual exclusivity in create_file. Add constraint: 'Exactly one of text_content or base64_content must be provided.' Validate in handler and return clear error if both/neither are set.