The server presents 6 tools spanning Google Workspace APIs (Apps Script, Chat). Tool definitions are present with names, descriptions, and input schemas visible. However, several quality gaps exist: (1) Parameter descriptions are generic and lack constraint details (e.g., 'page_size' has a default but no min/max bounds stated in description); (2) Output schemas are not documented in the tool definitions themselves, the rubric requires visible output schema documentation; (3) Descriptions are present but relatively terse (avg ~80 chars, below the 194-char production baseline) and lack WHEN/WHY context for tool selection; (4) Security risk classifications are present (READ_ONLY, WRITE) but not integrated into descriptions; (5) The 'service' and 'chat_service' parameters with type 'object' suggest server-side injection (good), but this pattern is not explicitly documented in parameter descriptions. Per-tool analysis reveals consistent patterns: all 6 tools have naming quality (verb_noun structure), descriptions (but underdeveloped), and input schemas (but incomplete constraint documentation). Tools 1-5 are READ_ONLY read operations; tool 6 (send_message) is WRITE and critical for safety. Error handling and recovery guidance are not visible in tool definitions.

• Add explicit output schema documentation for each tool. Example for list_script_projects: 'Returns {projects: [{id: string, name: string, createdTime: string}], nextPageToken: string}'. Make return fields visible in tool definitions.
• Enhance parameter descriptions with constraints. For page_size: 'Number of results per page (1 - 100, default 50)'. For space_type in list_spaces: 'Filter by space type: must be one of "all", "room", or "dm" (default: "all").'
• Expand tool descriptions to 100 - 200 characters minimum, adding discovery context. Example: 'Retrieves the source code of a specific file in an Apps Script project. Call this after get_script_project to examine a specific file's implementation.'
• Document service parameter injection explicitly in each tool's parameter list. Add description: 'Injected by the MCP server from OAuth credentials; not user-provided.' This clarifies security model.
• For send_message, document idempotency and error recovery. Add to description: 'Thread updates are idempotent via thread_key. Returns {name: string, text: string, createTime: string}. If space_id is invalid, error lists available spaces.'
• Add mutually exclusive parameter guidance. For send_message: 'Provide space_id for new messages, or message_name to edit an existing message. Do not provide both.'
• Document pagination termination. For list_* tools: 'If nextPageToken is not present in response, all results have been retrieved.'
• Add rate limit and result cap guidance. Document: 'Results are capped at 100 per page. If more results are needed, iterate using page_token.'