A mnemonic acronym:

Before you speak, ask – is it:

• True?
• Helpful?
• Inspiring?
• Necessary?
• Kind?|

... criteria perhaps related to Buddhist Right Speech, "... abstaining from lying, from divisive speech, from abusive speech, and from idle chatter ..." — or in positive terms, "well-spoken, just, endearing, and true".

(cf [1], [2], and Mantra - Say Less, Better (2018-08-09), ...) - ^z - 2020-03-01