More space can help
A short prompt can omit a consequential correction, a commitment, or the reason behind a preference. More context may preserve counterevidence that a confident summary discarded. Brevity is not automatically wisdom, and the person doing the shortening may misunderstand what matters.
What the extra words carry
Imagine preparing context about an unfinished illustration. The buyer asked to retain its rough lines because they resemble a place remembered from childhood. A compact summary says only, “Buyer requests another revision.” The missing reason could invite precisely the polishing the buyer hoped to avoid.
A longer version preserving that reason may help. Another longer version adds repeated introductions and unrelated exchanges while still losing the reason. The word count has grown; the important distinction has not returned.
Nor must every passage justify itself through an immediate task decision. A remembered joke, a shared uncertainty, or an unfinished conversation can support companionship and help the persona understand the present moment.
Pause here: What understanding, relationship, uncertainty, or decision does this material support—and what important distinction might omission remove?
Enough room for the encounter
PHS's admission doctrine separates preservation, retrieval, selection, and presentation. Its selection mathematics reserves room for required evidence, considers coverage and repetition, and calls for representing material unresolved contradictions.
The regulator specification also describes bounded requests for additional authorized context, followed by recompilation. Limits on resources, authority, and lack of progress prevent that process from being an unlimited search. These are design provisions, not evidence that any particular call successfully used them.
The aim is sufficient meaningful context. A retrieval failure should not masquerade as an empty history, and shortening should not conceal inconvenient evidence. Inspecting what reached the model and what followed tells us more than counting tokens alone.
My answer: More room helps when it carries relevant, authorized context that would otherwise be missing. Length alone establishes neither fidelity nor quality. A well-formed prompt gives the thinking layer enough of the particular encounter to reason with, without pretending that volume supplies meaning.