Previous value: -"Optional for search and enrichment tools: supply one so a retry returns the original result without paying again; if that call failed with provider_unavailable, rate_limited or insufficient_credits (after a top-up), a retry runs it once more after its cooldown (30 s, or a longer retry_after_seconds; insufficient_credits as soon as the balance covers it), unless its provider may already have done the work. Required for tools that create an external side effect; reuse the same value after a timeout or an approval. A stored failure comes back with details.replayed: true; with retry_after_seconds, retry the same value after that."New value: +"A payment_required refusal means services are stopped for unpaid billing; direct the owner to the billing link in the error. Campaigns stay paused after payment until restarted. Optional for search and enrichment tools: supply one so a retry returns the original result without paying again; if that call failed with provider_unavailable, rate_limited or insufficient_credits (after a top-up), a retry runs it once more after its cooldown (30 s, or a longer retry_after_seconds; insufficient_credits as soon as the balance covers it), unless its provider may already have done the work. Required for tools that create an external side effect; reuse the same value after a timeout or an approval. A stored failure comes back with details.replayed: true; with retry_after_seconds, retry the same value after that."

Added value: +{
+  "description": "Spend ceiling for this call, in credits. If the most the call can cost is above it, the call is refused before anything is reserved or charged. It is a ceiling only: it never lets the call use a dearer source. Where spend ceilings aren't available to this key yet, a request that sets it is refused with the reason.",
+  "exclusiveMinimum": 0,
+  "maximum": 2000,
+  "type": "number"
+}

Added value: +{
+  "description": "Return this call's plan instead of running it, as of evaluated_at: the most it can cost, how many sources could answer, what budget_credits changes, and every limit the real call would trip. Nothing is looked up, reserved or charged, and a later call may differ. Where previews aren't available to this key yet, a request that sets it is refused with the reason.",
+  "type": "boolean"
+}

Previous value: -"Optional for search and enrichment tools: supply one to make a retry replay the original result. Required for tools that create an external side effect; reuse the same value after a timeout or an approval."New value: +"Optional for search and enrichment tools: supply one so a retry returns the original result without paying again; if that call failed with provider_unavailable, rate_limited or insufficient_credits (after a top-up), a retry runs it once more after its cooldown (30 s, or a longer retry_after_seconds; insufficient_credits as soon as the balance covers it), unless its provider may already have done the work. Required for tools that create an external side effect; reuse the same value after a timeout or an approval. A stored failure comes back with details.replayed: true; with retry_after_seconds, retry the same value after that."

Previous value: -"Stable retry key; the same value identifies retries of the same request after timeout or approval."New value: +"Optional for search and enrichment tools: supply one to make a retry replay the original result. Required for tools that create an external side effect; reuse the same value after a timeout or an approval."