Is there a succinct term or phrase that would describes someone's ability to "keep cards close to their chest", as in, able to subtlety keep things secret.
For context, I'm working on a game where part of it is being able to determine your enemies' strengths and weaknesses (via "perception") and need a term for the attribute which counters perception to keep your strengths and weaknesses concealed.
Discreet fits the bill.
adjective
1 Careful and prudent in one's speech or actions, especially in order to keep something confidential or to avoid embarrassment.
If a quality of character is needed, discretion would be the word.
noun
1The quality of behaving or speaking in such a way as to avoid causing offence or revealing confidential information.
She knew she could rely on his discretion
guarded
If you describe someone as guarded, you mean that they are careful not to show their feelings or give away information.
https://www.collinsdictionary.com/dictionary/english/guarded
