This server has significant definition quality gaps. All 14 tools have descriptions (positive), but they are in Chinese and many are generic (10-30 chars). Input schemas are present for most tools but lack depth: parameters have type and description, but no enums for constrained fields like 'state' (should be enum: open|closed|draft), no min/max for numeric params, no format specs. Output schemas are completely undocumented, LLMs cannot predict what fields to expect from responses. Error handling is minimal (basic try-catch returning error strings). No tool annotations (readOnlyHint/destructiveHint). Tool names follow verb_noun pattern (good), but descriptions are too terse and in Chinese, limiting LLM comprehension. The server wraps GitHub CLI, so it's functional, but the MCP interface lacks the rigor needed for reliable agent composition.

• Translate all descriptions to English and expand to 50-150 chars. Example: 'repo_list' → 'List all GitHub repositories you own or contribute to. Returns repository names, URLs, and visibility status. Call this first to discover available repos.'
• Add output schemas to every tool. Document the JSON structure returned by the GitHub CLI. Example for repo_list: {type: 'object', properties: {repositories: {type: 'array', items: {type: 'object', properties: {name: {type: 'string'}, url: {type: 'string'}, isPrivate: {type: 'boolean'}}}}}}
• Convert 'state' parameters to enums. issue_list and pr_list should declare state as enum: ['open', 'closed', 'draft'] instead of free-form string.
• Add tool annotations. Mark repo_create, issue_create, pr_create, pr_comment, pr_approve, gist_create with destructiveHint: true. Mark all read-only tools with readOnlyHint: true.
• Enhance error messages with recovery guidance. Instead of '错误: {e.stderr}', return structured errors like {error: 'repo_not_found', message: 'Repository owner/name not found', suggestion: 'Try repo_list() to see available repositories', retryable: false}.