The shortest answer...

When words are many, transgression is not lacking, but whoever restrains his lips is prudent. 

Proverbs 10:19 ESV

One of the principles of linguistic analysis is that in context, the shortest answer is best. Brevity is key.

(We consider the expected and unexpected in context. For example, one exception might be the fear of not being believed when telling the truth.)

This also speaks in part to 'Grice's Maxims,' a total of four conversational principles suggested by philosopher Paul Grice to enhance effective communication. The four principles include:

1. Quantity

2. Quality

3. Relation

4. Manner

The verse pertains to the maxim of Quantity which requires the right amount of information to be provided. This means giving as much information as necessary for the conversation and no more.

Wisdom is to restrain the tongue. The more someone speaks, the more information they provide. The more words that are used often speaks to a need to convince of the truth as opposed to simply conveying what the truth is without any need for embellishment.

The first part of the verse notes the negative of transgression 'not' lacking, increasing the sensitivity. This is followed by the word 'but' (beware the underlying truth) and the significance of what follows, which speaks to the advice of 'restraint.'

It is far easier to 'convey' the truth as opposed to trying to 'convince' of it.

The Wisdom of Solomon and Proverbs was 'discovered' some 3000 years later.