Five tools with complete descriptions and clear naming. All tools follow verb_noun pattern (gemini_*). Descriptions are well-written (100-200 chars, within baseline 194 avg). However, input schemas lack critical details: no type constraints (enums, min/max), no parameter descriptions beyond bare strings, and no output schemas documented. Error handling exists (withGeminiErrorHandling wrapper) but lacks recovery guidance. Tools are read-only (good for safety) but lack idempotent/destructive annotations. Composition is sound, each tool has one responsibility. Missing: pagination for massive_context results, per-item success/failure for batch operations.

• Add JSON Schema constraints to all parameters: filePath should have minLength/maxLength and pattern (e.g. /\.(mp4|mov|webm)$/i); query should have minLength 1, maxLength 500; model should be an enum of supported Gemini models.
• Document output schemas for each tool. E.g. gemini_web_search returns {answer: string, sources: [{url: string, title: string}]}. This enables LLMs to extract and chain results.
• Add recovery guidance to error messages. E.g. 'File not found: /path/to/video.mp4. Check the path and ensure the file exists and is readable.' instead of just the error.
• Declare tool annotations in server registration: all five tools should include readOnlyHint: true to signal they do not modify state.
• For massive_context, add maxTotalBytes validation and document result truncation: 'Summaries are capped at 10,000 tokens. For larger analyses, split files and call multiple times.'