give more teeth

7月3日のThe Japan Times Onlineの記事 'Price cap on Russian oil to be about half of current price, Kishida says' から引用します。
The communique said an oil price cap plan could include options such as enabling transportation of Russian seaborne crude oil and petroleum products globally only if the oil is purchased at or below a specified price.
Limiting the oil price is expected to give more teeth to the existing sanctions imposed on Russia, as the country is believed to be profiting from high energy prices stemming from supply concerns due to the war.

"give more teeth"　は「より強化する」の様な意味の様ですが、辞書で確認します。辞書には "give teeth" で次の説明がありました。

・Farlex Dictionary of Idioms: To make something stronger or more effective, especially a rule or piece of legislation.: Senators are hoping to give teeth to the healthcare bill by attaching the threat of huge fines to insurance companies that don't comply.
・McGraw-Hill Dictionary of American Idioms and Phrasal Verbs: Fig. to make something powerful; to give something a real effect.: The severe penalty really gives teeth to the law. Strong enforcement puts teeth in the regulation.