When Washington wrote that the maxim "honesty is the best policy" should be applied to foreign relations, he meant that there was no need to be coy about U.S. intentions to avoid permanent alliances in the future. This reflects his belief in the importance of being straightforward and truthful in the country's foreign policy, advocating for clarity and integrity in its dealings with other nations. Thus, the correct answer is:
There was no need to be coy about U.S. intentions to avoid permanent alliances in the future.