diff --git a/apps/web/src/components/chat/MessagesTimeline.tsx b/apps/web/src/components/chat/MessagesTimeline.tsx
index 4e55991f870371832e077dd0553637334e24f503..df952aeca3828fbe6a9cf10febef5d5c426a6d0e 100644
--- a/apps/web/src/components/chat/MessagesTimeline.tsx
+++ b/apps/web/src/components/chat/MessagesTimeline.tsx
@@ -1918,11 +1918,13 @@ function LiveActivityRow({
   iconName,
   toolIcon,
   failed = false,
+  active = false,
 }: {
   label: string;
   iconName?: WorkEntryIconName;
   toolIcon?: ToolActivityIcon | undefined;
   failed?: boolean;
+  active?: boolean;
 }) {
   return (
     <div className="min-h-6 w-fit max-w-full min-w-0 overflow-hidden rounded-md text-sm leading-relaxed">
@@ -1932,6 +1934,7 @@ function LiveActivityRow({
         toolIcon={toolIcon}
         failed={failed}
         announceFailure={failed}
+        active={active}
       />
     </div>
   );
@@ -1943,12 +1946,14 @@ function LiveActivityContent({
   toolIcon,
   failed = false,
   announceFailure = false,
+  active = false,
 }: {
   label: string;
   iconName: WorkEntryIconName | undefined;
   toolIcon?: ToolActivityIcon | undefined;
   failed?: boolean;
   announceFailure?: boolean;
+  active?: boolean;
 }) {
   const showTrailingFailureMark =
     failed && iconName !== undefined && !toolIconAcceptsTint(iconName, toolIcon);
@@ -1978,7 +1983,7 @@ function LiveActivityContent({
           />
         </span>
       ) : null}
-      <span className="min-w-0 flex-1 truncate">{label}</span>
+      <span className={cn("min-w-0 flex-1 truncate", active && "live-tool-shine")}>{label}</span>
       {showTrailingFailureMark ? (
         <XIcon aria-hidden className={cn("size-3 shrink-0", failedToolIconClassName)} />
       ) : null}
@@ -2004,6 +2009,7 @@ function LiveWorkEntryTimelineRow({ row }: { row: Extract<TimelineRow, { kind: "
         iconName={workEntryIconName(row.entry)}
         toolIcon={row.entry.toolIcon ?? row.entry.toolSource?.icon}
         failed={failed}
+        active={row.active}
       />
     </button>
   );
diff --git a/apps/web/src/index.css b/apps/web/src/index.css
index 54bb5b70d5fa81606493c888646b28301d189f53..1369cd31f5b3c74968d1331c064a54aa5df36671 100644
--- a/apps/web/src/index.css
+++ b/apps/web/src/index.css
@@ -425,6 +425,34 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
   }
 }
 
+@keyframes live-tool-shine {
+  from {
+    background-position:
+      -4.5rem 0,
+      0 0;
+  }
+  to {
+    background-position:
+      calc(100% + 4.5rem) 0,
+      0 0;
+  }
+}
+
+@utility live-tool-shine {
+  @media (prefers-reduced-motion: no-preference) and (forced-colors: none) {
+    color: transparent;
+    background-image:
+      linear-gradient(to right, transparent, var(--contrast-foreground), transparent),
+      linear-gradient(var(--contrast-secondary-label), var(--contrast-secondary-label));
+    background-size:
+      4.5rem 100%,
+      100% 100%;
+    background-repeat: no-repeat;
+    background-clip: text;
+    animation: live-tool-shine 2.2s steps(30) infinite;
+  }
+}
+
 @property --assistant-citation-highlight-opacity {
   syntax: "<number>";
   inherits: true;