Three tools with basic schemas and minimal descriptions. execute_query lacks parameter descriptions and has no output schema documented. list_tables and describe_table have no parameter descriptions. All descriptions are under 100 chars and lack context on WHEN to use each tool or what they return. No error handling guidance. No mention of SQL injection risks for execute_query despite accepting arbitrary SQL. Missing idempotency and state-change documentation.

• Add output schema documentation for each tool. Example for execute_query: 'Returns array of objects where keys are column names and values are row data. Limit results to 1000 rows; use LIMIT clause for pagination.'
• Expand execute_query description to 150+ chars: 'Execute a SQL SELECT query against Snowflake. Returns results as JSON array of objects. Use for data retrieval only, for schema changes, use describe_table or list_tables. Supports pagination via LIMIT/OFFSET.'
• Add parameter descriptions: describe_table.table_name should state 'Table name (case-insensitive, optionally schema-qualified like SCHEMA.TABLE_NAME).'
• Implement SQL injection protection: validate query syntax, reject DDL/DML (CREATE, DROP, INSERT, UPDATE, DELETE), or require explicit confirmation for write operations. Document this in the description.
• Replace generic error handling with categorized responses: 'SQL syntax error: {details}. Check query and retry.' vs 'Connection failed: {details}. Verify Snowflake credentials and retry.' vs 'Permission denied: {details}. Contact admin.'