Single tool with minimal schema and description. The take_screenshot tool has a basic description (67 chars, within range) but ZERO input parameters documented, the input schema is empty {}. No parameter descriptions, no output schema documentation, no error handling guidance. The tool name is verb-based (take_screenshot) which is correct, but the implementation lacks the rigor expected of production tools. No pagination, no structured output schema visible, no error recovery hints.

• Add explicit input schema documentation (even if empty, document why: 'This tool takes no parameters'). Consider adding optional parameters like 'region' (bounding box) or 'format' (jpeg/png) for flexibility.
• Document the output schema: 'Returns an Image object with fields: data (base64-encoded bytes), format (string: jpeg|png)'. This enables LLMs to understand what they receive.
• Expand description to 100-150 chars: 'Take a screenshot of the user's screen and return it as a JPEG image. Requires a graphical display; fails on headless systems. Use this to see what the user is viewing.'
• Add error handling guidance: 'If the tool fails, the system may be headless or the display may be unavailable. Inform the user and suggest alternative approaches.'
• Document security implications: 'This tool reads the entire screen, including sensitive information. Ensure the agent is trusted and audit all invocations.'

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

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