diff --git a/packages/subagent/subagent/src/descriptor.ts b/packages/subagent/subagent/src/descriptor.ts
index 4cec72e658..55ba73dcc4 100644
--- a/packages/subagent/subagent/src/descriptor.ts
+++ b/packages/subagent/subagent/src/descriptor.ts
@@ -13,9 +13,10 @@
  * `delegationDepth` as the monotone floor — and `outputSchema`, which belongs
  * to one activation's result contract rather than durable child composition.
  * Per-activation knobs such as `maxTokens` are omitted for the same reason as
- * `outputSchema`: they budget one activation and, on cold resume, no parent
- * exists to inherit them from, so the resumed activation runs under the
- * deployment defaults rather than restoring a stale budget.
+ * `outputSchema`: they budget one activation. Cold resume requires the exact
+ * live parent for authorization but reconstructs child options only from the
+ * durable descriptor, so it neither restores the prior budget nor inherits
+ * the parent's current one; the resumed route's defaults apply instead.
  *
  * @module @deepseek-ai/dsh-subagent/descriptor
  */