Answer:
The Platt Amendment might be considered ironic because while it is an agreement that will keep foreign nations from interfering in the affairs of Cuba, the United States continued to be involved in the nation's affairs, even maintaining a naval station in Guantanamo Bay. So, signing an agreement to keep foreign nations away from Cuba while still getting itself involved is an ironic situation.
Explanation:
The Platt Amendment was a treaty between the United States and Cuba that aims to prevent any foreign nation from interfering in Cuba's internal affairs. This was an attempt by the United States to protect Cuba's independence.
This amendment is ironic because of the very nature of the agreement. While it ensures the independence of Cuba from any foreign nation's intervention in its affairs, the US still makes its presence in the nation. While stating that the main objective of the agreement was to make Cuba an independent nation without any other nation's intervention or involvement, the United States still maintained or got involved in the South American nation's affairs, including the establishment of the naval station at Guantanamo Bay.