What did Washington mean when he wrote that the maxim "honesty is the best policy" should be applied to foreign relations?

When Washington wrote that the maxim "honesty is the best policy" should be applied to foreign relations, he meant that it is best for a nation to be truthful and straightforward in its dealings with other countries. Washington believed that honesty and transparency would foster trust and good faith among nations, and ultimately lead to more stable and productive relationships. He advocated for being open about national interests and intentions, rather than resorting to deceit or manipulation, as he believed that it would promote long-term peace and prosperity.