The reserve ratio is sometimes used as a tool in monetary policy, influencing the country's economy, borrowing, and interest rates.

央行年内十次上调存款准备金率，也是我们货币从紧政策的一个体现了。

youdao

So that will be the monetary policy tool.

所以，这将会是货币政策的工具。

耶鲁公开课 - 金融市场课程节选

Switzerland has the ability to stabilize its currency from upward pressure because its monetary policy tool is unlimited it could always print out more swiss franc to satisfy market demand.

FORBES: Central Banks Are Never "Out of Ammunition"

For once deflation has taken hold, monetary policy becomes a blunt tool.

ECONOMIST: Euro-area economies

But unsterilised intervention is only monetary policy by another name, not an extra policy tool.

ECONOMIST: Meddling in the currency market