Server has 8 tools with consistent naming (verb_noun pattern) and basic schemas via Zod. All tools have descriptions and input parameters are typed. However, descriptions are generic (avg ~80 chars, below 194-char baseline), output schemas are not documented, error handling is absent, and no guidance on when to use each tool vs. similar ones. Parameter descriptions lack format/constraint details. No pagination documented despite list_* tools. Missing security considerations (GITHUB_TOKEN exposure risk). Composition is reasonable but lacks idempotency guarantees and chaining metadata.

• Document output schema for each tool. Example: 'Returns object with fields: number (int), title (string), html_url (string), state (enum: open|closed), created_at (ISO 8601 date).'
• Add error handling with actionable recovery hints. Example: 'If repo not found, try search_code() to verify the repository exists and is accessible.'
• Implement secret injection: accept GITHUB_TOKEN via MCP initialization or secure config, not raw env var. Prevents token leakage in error traces.
• Enhance descriptions with selection guidance. Example for list_pull_requests: 'Use this to find PRs by state/date. For code search across repos, use search_code() instead.'
• Add pagination to list_* tools: accept limit (1-100, default 30) and offset/cursor parameters. Document max result count in description.