unguarded

candid indiscreet offhand spontaneous

accessible artless careless casual direct foolhardy frank headlong heedless honest ill-considered impolitic imprudent impulsive incautious ingenuous naive rash straightforward unalert uncircumspect unconscious undiplomatic unpremeditated unreflective unthinking unvigilant unwatchful unwise vulnerable weak

deliberate planned

careful cautious thoughtful