Execute a SQL statement against the MySQL server. Use for SELECT, DML (INSERT/UPDATE/DELETE), SHOW, DESCRIBE, and ad-hoc queries. Supports cross-database queries using database.table notation. Single statements only — use fully qualified names instead of USE statements. Write/delete statements require user confirmation: depending on the client, either a confirmation prompt appears, or the first call returns a confirm_token — show the SQL to the user, and after explicit consent re-call with the same query plus confirm_token. Use the optional alias parameter to target a different configured database within a single connection.

Get column metadata for a table or all tables in the configured database: column names, data types, nullability, default values, and comments. Call this before querying an unfamiliar table. Omit table_name to see all tables at once. Accepts bare table names (uses MYSQL_DATABASE) or database.table for cross-database lookups. Use alias to target a different configured database.

Fetch a small sample of rows from a table to understand its data format and content. Use alongside get_schema_info before writing complex queries. Accepts bare table names (uses MYSQL_DATABASE) or database.table for cross-database lookups. Use alias to target a different configured database.