This server has significant definition quality gaps. Of 5 tools, 3 have descriptions under 100 characters (execute_sql, get_chinese_initials, get_table_index), and all lack proper English descriptions (Chinese descriptions do not count for LLM-optimization criteria). Tool naming is mostly acceptable (verb_noun convention), but descriptions are too terse to guide LLM selection. All tools declare input schemas with types, but parameter descriptions are single-line summaries. Output schemas are not documented anywhere in the codebase. Error handling is not evident from the tool implementations provided. The execute_sql tool is especially risky, it accepts arbitrary SQL with no visible validation, dry-run support, or confirmation gate, yet the description is only 25 characters in Chinese.

• Rewrite all tool descriptions in English, 50-200 chars, following the pattern: 'This tool [WHAT]. Use it when [WHEN]. Returns [STRUCTURE].' Example: 'execute_sql: Execute one or more SQL statements (separated by ;) on the connected MySQL database. Use this to query, insert, update, or delete data. Returns result rows and row count. WARNING: destructive operations are irreversible.'
• For execute_sql, add a 'dry_run' boolean parameter (default false) to preview the query plan without executing. Add a 'confirm' step for statements matching DELETE|DROP|ALTER patterns.
• Add permission checks in execute_sql: verify the calling agent has 'write:database' scope. Fail fast with 'Insufficient permissions for destructive operation' if write access is revoked.
• Document output schemas for all tools in code comments or a separate schema.json file. Specify field names, types, and nesting. Example: 'execute_sql returns {"rows": [{"col1": any, ...}], "row_count": int, "affected_rows": int, "error": string|null}'.
• Expand parameter descriptions to 20-50 chars each, mentioning constraints. E.g., 'query: SQL statement(s) to execute, max 10000 chars, separated by semicolons if multiple.'
• Add error handling: catch SQL syntax errors, connection failures, timeouts. Return structured error: {"error": "<type>", "message": "<user-friendly>", "suggestion": "<recovery>"} instead of stack traces.
• Rename get_chinese_initials to convert_chinese_to_pinyin_initials or similar to clarify intent. Add description: 'Convert Chinese text to pinyin initials for field naming. Use before creating tables with Chinese column names. Returns comma-separated initials.'