diff --git a/apps/desktop/src/components/assistant-ui/tool/delegate.tsx b/apps/desktop/src/components/assistant-ui/tool/delegate.tsx
index 74a8e16cae3..8ec3d92b243 100644
--- a/apps/desktop/src/components/assistant-ui/tool/delegate.tsx
+++ b/apps/desktop/src/components/assistant-ui/tool/delegate.tsx
@@ -149,7 +149,7 @@ export const DelegateTool: FC<Pick<ToolPart, 'args' | 'result' | 'toolCallId'>>
   }
 
   return (
-    <div className="grid min-w-0 max-w-full gap-(--tool-row-gap)" data-slot="tool-block">
+    <div className="grid min-w-0 gap-(--tool-row-gap)" data-delegate-card="" data-slot="tool-block">
       {rows.map(row => (
         <DelegateRowView key={row.id} row={row} />
       ))}
diff --git a/apps/desktop/src/styles.css b/apps/desktop/src/styles.css
index e411f451df0..2e5f3b10001 100644
--- a/apps/desktop/src/styles.css
+++ b/apps/desktop/src/styles.css
@@ -1331,6 +1331,14 @@ text-* variant utilities. */ .btn-arc {
   max-width: 100%;
 }
 
+/* A delegation is a list of short rows — goal, model, timer — not prose, so it
+   reads better narrow than stretched across the full reading column. Scoped
+   here rather than as a utility on the element: the rule above sets width on
+   every tool block and would win over it. */
+[data-slot='aui_assistant-message-content'] [data-slot='tool-block'][data-delegate-card] {
+  max-width: 75%;
+}
+
 [data-slot='aui_assistant-message-content'] .aui-md [data-streamdown='code-block'] code {
   max-width: none;
   font-family: inherit;