"I did not think it politic to express my reservations"

Similar:

wise, prudent, sensible, judicious, canny, well judged, sagacious, expedient,

shrewd, astute, discreet, tactful, diplomatic, recommended, advantageous

beneficial, profitable, gainful, desirable, advisable, appropriate, suitable

timely, opportune, propitious, provident

Opposite:

inadvisable, injudicious, unwise