Strong foundation with 14 well-named tools, complete input schemas, and clear descriptions. All tools follow verb_noun naming (get_, list_, create_, etc.). Descriptions are concise (50-150 chars) and state what each tool does. Input parameters have types and descriptions. However, output schemas are not documented, LLMs cannot see what fields to expect from responses. Write-gated tools lack explicit permission/scope declarations. Error handling guidance is minimal. No tool annotations (readOnlyHint/destructiveHint) despite clear read/write distinction.

• Document output schemas for all 14 tools. Specify which fields are returned (e.g., get_repo returns {owner, repo, description, language, stars, forks, open_issues, default_branch, archived, license, last_push_time}). Use JSON Schema or a structured format in tool descriptions.
• Add tool annotations: mark read tools with readOnlyHint=true; mark write tools with destructiveHint=true and idempotentHint=false (or true if idempotent). This enables clients to auto-detect safe retry patterns.
• Declare permission scopes for write tools. Add a 'scope' field or extend descriptions: 'Requires scope: write:issues' for create_issue, 'write:pull_requests' for create_pr_review_comment, etc.
• Constrain 'state' parameters to enums. Replace free-form strings with explicit options: state: enum[open|closed|all] for list_issues and list_pull_requests. Add validation and error messages like 'Invalid state: got "pending", must be one of: open, closed, all'.
• Add error recovery guidance. Wrap API calls with structured error responses: 'Repository not found. Try search_repos() to find the correct owner/repo.' This guides LLM recovery without extra discovery calls.