This server defines 2 tools with reasonable naming (verb_noun pattern) and basic descriptions, but has critical gaps in schema documentation, parameter descriptions, and error handling. Tool descriptions are adequate (60-100 chars) but parameter documentation is sparse or missing. Input schemas are visible in the source but lack proper JSON Schema structure with type definitions and per-parameter descriptions. No output schemas are documented. Error handling is minimal, the code catches exceptions but returns generic error messages without recovery guidance. The tools themselves are functional image generation/transformation operations, but the MCP interface lacks the rigor expected for production use.

• Add formal JSON Schema definitions with 'type', 'required', and 'properties' for all tools. Example: {"type": "object", "properties": {"prompt": {"type": "string", "description": "..."}}, "required": ["prompt"]}
• Document output schemas for both tools. Specify: Does the tool return a file path? Base64-encoded image? URL? What fields are in the response object?
• Expand parameter descriptions to include format constraints. E.g., 'image_uri: URL of the image to transform (must be publicly accessible HTTP/HTTPS URL or a resource URI from this server)'
• Add tool annotations using destructiveHint for both tools since they write to disk and consume API quota. Consider implementing a dry_run parameter or confirmation pattern.
• Implement structured error responses. Instead of 'Error calling Gemini API: ...', return: {"error": "gemini_api_failed", "message": "...", "recovery": "Retry the request. If the error persists, check GEMINI_API_KEY is set and valid."}
• Enhance tool descriptions with WHEN guidance. E.g., 'Use generate_image_from_text to create new images from scratch; use transform_image_from_resource to modify or enhance an existing image.'
• Add per-parameter validation with clear error messages. E.g., if image_uri is invalid, return 'Invalid image_uri: must be an HTTP/HTTPS URL or a valid resource URI' instead of a generic exception.

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

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