Solid foundation with clear naming (verb_noun pattern: gh_whoami, gh_my_repos, gh_search_*) and consistent parameter schemas. All 9 tools have descriptions and input schemas with types. However, descriptions are terse (avg ~60 chars, well below the 194-char baseline), parameter descriptions lack depth (e.g., 'GitHub username or organization name' for gh_user_repos is minimal), and output schemas are entirely undocumented. No error handling guidance, no recovery hints, and no tool annotations (readOnlyHint, etc.). Pagination is present but not fully documented. Security is sound (token via env var, read-only scope), but descriptions don't explain WHEN to use each tool vs. alternatives (e.g., gh_my_repos vs. gh_search_repos).

• Document output schemas for all tools. E.g., gh_my_repos should declare: 'Returns array of {name, url, stars, updated_at, description}'. This enables LLMs to plan chaining and extract fields correctly.
• Expand tool descriptions to 100-200 chars. Add WHEN clauses: 'Use gh_my_repos() for "my repositories", never a search. Use gh_search_repos() to find repos by keyword across GitHub.' This disambiguates overlapping tools.
• Move sort/state/visibility enums into parameter descriptions with explicit constraints. E.g., 'sort (enum: stars|forks|updated, optional)' in the parameter description, not just the tool description.
• Add error recovery hints to tool descriptions. E.g., 'If repo not found, try gh_search_repos() with a partial name.' This guides LLM self-correction.
• Add readOnlyHint: true to all tool definitions (via fastmcp tool decorator or MCP schema). This signals to clients that these tools are safe to cache and retry.