cagey
adjective
[ ˈkeɪdʒi ]
• reluctant to give information owing to caution or suspicion.
• "a spokesman was cagey about the arrangements his company had struck"
Similar:
secretive,
guarded,
non-committal,
tight-lipped,
reticent,
cautious,
circumspect,
chary,
wary,
careful,
evasive,
elusive,
equivocal,
discreet,
Origin:
early 20th century (originally US): of unknown origin.