Two tools with minimal documentation. dbquery has a basic description (56 chars) and single string parameter with description, but no output schema documented. getschema has a minimal description (47 chars) and no parameters documented. Neither tool includes error handling guidance, recovery hints, or output structure documentation. Parameter descriptions exist but are sparse. No input validation constraints (enums, ranges, patterns) are declared. Security concerns: dbquery accepts arbitrary SQL with no injection protection or permission gating. Both tools open database connections on every call (inefficient). No idempotency guarantees or confirmation steps for destructive operations.

• Add formal output schema documentation for both tools. For dbquery: document that it returns an array of objects with column names as keys and values of mixed types. For getschema: document the nested structure (table_name → [column_names]).
• Add input validation and SQL injection protection to dbquery. Implement parameterized queries, reject DDL/DML keywords, or require explicit confirmation for destructive operations. Update description to warn: 'Executes SQL queries. WRITE operations require confirmation.'
• Enhance error messages with recovery guidance. E.g., 'Database connection failed: check DB_CONN_STRING is set and database is reachable. Retry after verifying connection.' instead of raw error.
• Add permission gating to dbquery. Verify caller has 'write:database' or 'read:database' scope before execution. Log all queries for audit trail.
• Optimize connection handling: reuse a connection pool instead of opening/closing on every call. Document connection pooling in implementation notes.