What is the EU anti-coercion 'bazooka' it could use against the US over Greenland?

The invocation of the EU's anti-coercion instrument highlights the bloc's growing awareness of the need to protect its member states from external economic pressures. However, its lack of prior use suggests a hesitance or uncertainty in the EU's approach to trade conflicts, particularly with a powerful entity like the United States. The effectiveness of such a tool remains to be seen, especially in the context of escalating global trade tensions.