Three tools with basic verb-noun naming (list_tables, describe_table, execute_sql_query) and present descriptions. However, descriptions are minimal (10-40 chars), lack context on WHEN to use each tool, and omit dependency hints. Input schemas exist but are sparse: list_tables has empty schema ({}), describe_table and execute_sql_query have single string params with minimal descriptions. No output schemas documented. execute_sql_query lacks safety guidance despite accepting arbitrary SQL. No error handling guidance for LLMs. Tools are READ_ONLY but descriptions don't state this. Missing pagination, result limits, and structured output documentation.

• Expand list_tables description to 100-150 chars: 'List all available tables in the database. Call this first to discover schema structure before querying. Returns table names only; use describe_table to inspect columns.'
• Add output schema documentation: list_tables returns array of strings (table names); describe_table returns formatted schema string with column names and types; execute_sql_query returns array of tuples or error message.
• Enhance execute_sql_query description with constraints: 'Execute SELECT queries only (no INSERT/UPDATE/DELETE). Max 1000 rows returned. Timeout 30s. If query fails, check syntax and column names using describe_table.'
• Add parameter descriptions for table_name and query: 'table_name: exact table name (case-sensitive); query: valid SQL SELECT statement with proper WHERE clauses to limit results.'
• Implement structured error responses: instead of 'SQL Error: {e}', return JSON with error_type (syntax|timeout|not_found), message, and recovery_hint (e.g., 'Call describe_table("users") to verify column names').