Wayland MCP provides 7 tools with inconsistent quality across dimensions. Naming is action-verb based and mostly clear (move_mouse, click_mouse, drag_mouse, scroll_mouse, capture_screenshot, compare_images, analyze_screenshot). However, critical gaps exist: (1) Several tools lack input schema visibility or complete parameter definitions, compare_images and analyze_screenshot show parameters but no explicit type constraints visible in source; (2) Description quality varies widely, some are clear and actionable (scroll_mouse: 161 chars with specifics on units), others are minimal (click_mouse: 61 chars, no context on what happens); (3) No output schemas documented anywhere, LLMs cannot know what fields to expect from tools; (4) Error handling is absent, no guidance on what to do if a tool fails; (5) Security concerns: tools directly control desktop input/output without documented permission gates or audit logging. The server implements desktop automation tooling (a legitimate use case), but the definitions lack LLM-readiness patterns. Average tool score: 52.

• Document explicit output schemas for all tools. Example for capture_screenshot: {success: boolean, path: string, width: integer, height: integer, message: string}
• Expand click_mouse description to 100-150 characters explaining: (1) cursor must be positioned first, (2) simulates a left-button press+release, (3) returns success or error message.
• Add error handling descriptions to VLM-dependent tools (compare_images, analyze_screenshot): 'Requires VLM provider (GEMINI_API_KEY, AZURE_API_KEY, or OPENROUTER_API_KEY). Returns error if key is not set or image file not found.'
• For compare_images and analyze_screenshot, add input validation in descriptions: 'image_path must be an absolute path to a PNG or JPEG file (max 10MB). Returns error if file does not exist or format is unsupported.'
• Add permission scope documentation to input control tools (move_mouse, click_mouse, drag_mouse, scroll_mouse): 'Requires: write:desktop-input. These tools are destructive and affect the running desktop session.'
• Implement audit logging in tool implementations and document in server description: 'All desktop input/output operations are logged to WAYLAND_MCP_LOG. Each call records timestamp, action, parameters, and result for compliance.'
• For scroll_mouse, the description is strong but lacks edge-case guidance. Add: 'If scrollable region is not in focus, scroll may have no visible effect. Consider move_mouse + focus first.'
• Add parameter constraints to all numeric parameters: move_mouse x/y should document screen resolution bounds; scroll_mouse amount should document typical range (e.g., -10 to 10).

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

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