This server has critical definition gaps. Tool descriptions are present but minimal (10-50 chars, well below the 194-char baseline). Input schemas exist for most tools but lack parameter descriptions, the 'commands' tool has NO schema at all. Parameter types are defined but descriptions are sparse or missing entirely. No output schemas documented. Error handling is minimal (basic 400/500 responses with no recovery guidance). The 'generate' tool exposes a critical security risk: it calls an external LLM API but does not document this dependency or failure modes. Overall, this reads as a prototype rather than production-grade tooling.

• Add comprehensive output schemas for all tools. Document the structure of responses, field types, and pagination (if applicable). E.g., 'commands returns an array of objects with fields: id (string), type (string: cube|sphere), position (array of 3 numbers), scale (array of 3 numbers), color (hex string).'
• Expand parameter descriptions to 50-100 chars each. For 'updates' in update tool, specify: 'Object containing mutable properties: position (array [x,y,z]), scale (array [x,y,z]), color (hex #RRGGBB). All fields optional.'
• Document the generate tool's dependency on Google Gemini API. Add error handling for API failures (timeout, quota, invalid key). Return actionable errors: 'Gemini API quota exceeded. Try again in 1 minute or check GOOGLE_API_KEY.'
• Implement error classification. Distinguish retryable errors (timeout, rate limit) from user-fixable (missing required param) from fatal (invalid object ID). Return recovery guidance in every error response.
• Add tool descriptions that explain WHEN to use each tool and what it returns. Current descriptions (10-50 chars) are too brief. Target 100-200 chars per tool, following the pattern: 'What it does. When to use it. What it returns.'