googleapis/mcp-toolbox · error

unable to register driver: %w

Error message

unable to register driver: %w

What it means

Error "unable to register driver: %w" thrown in googleapis/mcp-toolbox.

Source

Thrown at internal/sources/cloudsqlmysql/cloud_sql_mysql.go:269

		return nil, fmt.Errorf("unable to get Cloud SQL connection config: %w", err)
	}

	// Create a new dialer with options
	userAgent, err := util.UserAgentFromContext(ctx)
	if err != nil {
		return nil, err
	}
	opts, err := sources.GetCloudSQLOpts(ipType, userAgent, useIAM)
	if err != nil {
		return nil, err
	}

	// Use a unique driver name based on the source name.
	driverName := fmt.Sprintf("cloudsql-mysql-%s", name)

	if !slices.Contains(sql.Drivers(), driverName) {
		if _, err := mysql.RegisterDriver(driverName, opts...); err != nil {
			return nil, fmt.Errorf("unable to register driver: %w", err)
		}
	}

	dsn := buildDSN(user, pass, driverName, project, region, instance, dbname, userAgent, useIAM, readOnly)

	db, err := sql.Open(
		driverName,
		dsn,
	)
	if err != nil {
		return nil, err
	}
	return db, nil
}

View on GitHub (pinned to 8cc6e09de2)

When it happens

Trigger: Thrown at internal/sources/cloudsqlmysql/cloud_sql_mysql.go:269 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of googleapis/mcp-toolbox@8cc6e09de2 (2026-09-05). Data as JSON: /api/errors/477e660d5571ff85. Report an issue: GitHub.