diff --git a/frontend/packages/swarm-ui/src/agent/detail/AgentInference.tsx b/frontend/packages/swarm-ui/src/agent/detail/AgentInference.tsx
index 263ed1e3d..630001e9c 100644
--- a/frontend/packages/swarm-ui/src/agent/detail/AgentInference.tsx
+++ b/frontend/packages/swarm-ui/src/agent/detail/AgentInference.tsx
@@ -395,7 +395,9 @@ function InferenceForm({
     <Panel title={`inference — ${agent}`} icon="🧠" onClose={onClose}>
       <p>
         Sets what the swarm makes {agent} run on. A field left empty stays the
-        agent's own value; an empty max subagents is no cap. The agent picks a
+        agent's own value; an empty max subagents is no cap. The soft context
+        limit is a share of the context window: the agent compacts at the end of
+        a turn once it is past it, and a turn can run past it. The agent picks a
         change up within seconds; a turn already running finishes on what it
         started with, and subagents already running past a lowered cap keep
         running.