As Secretary of Foreign Affairs, Cayetano took an "objective-based" approach in resolving the territorial disputes of the Philippines, which he described as negotiation through the use of historical facts, such as the Treaty of Paris of 1898 and the United Nations Convention on the Law of the Sea, to defend the Philippines' claims. He also vowed to avoid "microphone diplomacy", which he defined as the continual issuing of public statements instead of privately negotiating the issues with the parties.
