Two tools with basic schemas and descriptions, but significant gaps in parameter documentation, output schema clarity, and error handling. Both tools expose GitHub tokens as parameters (critical security issue). Descriptions are present but generic (avg ~80 chars, below 194-char baseline). Parameter descriptions exist but lack format/constraint details. No output schema documented. No error recovery guidance. Tool names follow verb_noun pattern correctly.

• Move GitHub token to server-side environment variable injection. Remove 'token' parameter from tool definitions. Initialize Octokit with process.env.GITHUB_TOKEN inside the tool handler.
• Document output schemas explicitly. For get_repository_structure, declare: returns {repository: {owner, repo, structure: [{name, path, type, size?, download_url?, children?}]}, files?: [{path, content}]}. For get_file_content, declare: returns {path, content}.
• Add error recovery guidance. Instead of returning empty array/null on error, return {error: 'Repository not found. Verify owner and repo names are correct.', retryable: true} or similar. Guide LLM on next steps.
• Enhance parameter descriptions with constraints. E.g., 'owner: GitHub username (alphanumeric, 1-39 chars)', 'extensions: file extensions without dot (e.g. ["ts", "js"]); use ["*"] to include all files'.
• Improve tool descriptions to 50-200 chars and include selection context. E.g., 'get_repository_structure: Fetch the directory tree of a GitHub repo. Use this first to explore structure; then call get_file_content for specific files.' Include what the tool returns.