diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 00000000..79400b6f
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,3 @@
+## 2025-02-12 - Added ARIA attributes to icon-only More options button
+**Learning:** Icon-only buttons that trigger menus or dialogs often lack the necessary ARIA attributes to communicate their state and purpose to screen readers. In `EventAnnotations.tsx`, the `MoreHorizontal` button was missing `aria-label`, `aria-expanded`, and `aria-haspopup`.
+**Action:** When implementing togglable menu triggers (e.g., 'More actions' buttons), always ensure they include an 'aria-expanded' attribute reflecting their current state, a descriptive 'aria-label', an 'aria-haspopup' attribute (e.g., 'menu'), and 'aria-hidden="true"' on any purely decorative internal icons.
diff --git a/src/components/events/EventAnnotations.tsx b/src/components/events/EventAnnotations.tsx
index aefd7007..88ded451 100644
--- a/src/components/events/EventAnnotations.tsx
+++ b/src/components/events/EventAnnotations.tsx
@@ -325,8 +325,11 @@ export default function EventAnnotations({
                                 setShowActionsFor(showActionsFor === thread.id ? null : thread.id)
                               }
                               className="rounded-lg p-1.5 text-[#9CA3AF] hover:bg-[#F8FAFC] hover:text-[#666666] transition-colors"
+                              aria-label="More actions"
+                              aria-expanded={showActionsFor === thread.id}
+                              aria-haspopup="menu"
                             >
-                              <MoreHorizontal className="size-4" />
+                              <MoreHorizontal className="size-4" aria-hidden="true" />
                             </button>
 
                             <AnimatePresence>