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

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

Because Europe's governments have signed away national control of interest rates, fiscal policy is the only tool to hand if the single monetary policy leaves their economies growing more slowly than they might, or faster than they can sustain without pressure on wages and property prices.

ECONOMIST: Europe grows apart