diff --git a/packages/design-system/src/components/OcButton/OcButton.vue b/packages/design-system/src/components/OcButton/OcButton.vue
index d8b9907b36a..2de708d2693 100644
--- a/packages/design-system/src/components/OcButton/OcButton.vue
+++ b/packages/design-system/src/components/OcButton/OcButton.vue
@@ -2,7 +2,7 @@
   <component
     :is="type"
     v-bind="additionalAttributes"
-    :aria-label="ariaLabel"
+    :aria-label="ariaLabel || null"
     :class="ocButton_buttonClass"
     v-on="handlers"
   >
diff --git a/packages/web-pkg/src/components/ContextActions/ActionMenuItem.vue b/packages/web-pkg/src/components/ContextActions/ActionMenuItem.vue
index 78158965f93..73ec4a0ef83 100644
--- a/packages/web-pkg/src/components/ContextActions/ActionMenuItem.vue
+++ b/packages/web-pkg/src/components/ContextActions/ActionMenuItem.vue
@@ -1,7 +1,7 @@
 <template>
   <li v-oc-tooltip="componentProps.disabled ? action.disabledTooltip?.(actionOptions) : ''">
     <oc-button
-      v-oc-tooltip="showTooltip || action.hideLabel ? action.label(actionOptions) : ''"
+      v-oc-tooltip="showTooltip || action.hideLabel ? tooltipText : ''"
       :type="componentType"
       v-bind="componentProps"
       :class="[action.class, 'action-menu-item', 'oc-py-s', 'oc-px-m', 'oc-width-1-1']"
@@ -9,7 +9,8 @@
       data-testid="action-handler"
       :size="size"
       justify-content="left"
-      :title="action.label(actionOptions)"
+      :title="tooltipText"
+      :aria-describedby="uniqueId"
       v-on="componentListeners"
     >
       <oc-img
@@ -51,11 +52,14 @@
         v-text="action.shortcut"
       />
     </oc-button>
+    <span :id="uniqueId" class="oc-invisible-sr">
+      {{ tooltipText }}
+    </span>
   </li>
 </template>
 
 <script lang="ts" setup>
-import { computed, unref } from 'vue'
+import { computed, unref, useId } from 'vue'
 import { Action, ActionOptions, useConfigStore } from '../../composables'
 import { useGettext } from 'vue3-gettext'
 import { storeToRefs } from 'pinia'
@@ -98,6 +102,16 @@ const componentType = computed<string>(() => {
   return 'button'
 })
 
+const uniqueId = useId()
+
+const tooltipText = computed<string>(() => {
+  if (action?.tooltip) {
+    return `${action.label(actionOptions)} - ${action.tooltip(actionOptions)}`
+  }
+
+  return action.label(actionOptions)
+})
+
 const ariaLabel = computed<string | null>(() => {
   if (componentProps.value.disabled && action.disabledTooltip) {
     return action.disabledTooltip(actionOptions)
diff --git a/packages/web-pkg/src/composables/actions/files/useFileActionsDisableSync.ts b/packages/web-pkg/src/composables/actions/files/useFileActionsDisableSync.ts
index 1ac827777c6..0f371e6d959 100644
--- a/packages/web-pkg/src/composables/actions/files/useFileActionsDisableSync.ts
+++ b/packages/web-pkg/src/composables/actions/files/useFileActionsDisableSync.ts
@@ -16,7 +16,7 @@ import { useMessages, useConfigStore, useResourcesStore } from '../../piniaStore
 export const useFileActionsDisableSync = () => {
   const { showMessage, showErrorMessage } = useMessages()
   const router = useRouter()
-  const { $gettext, $ngettext } = useGettext()
+  const { $gettext, $ngettext, $pgettext } = useGettext()
 
   const clientService = useClientService()
   const loadingService = useLoadingService()
@@ -81,6 +81,11 @@ export const useFileActionsDisableSync = () => {
       icon: 'spam-3',
       handler: (args) => loadingService.addTask(() => handler(args)),
       label: () => $gettext('Disable sync'),
+      tooltip: () =>
+        $pgettext(
+          'Explanation tooltip for the disable sync action in files shared with me and spaces',
+          'Only affects desktop and mobile clients. You can toggle this setting here, but it will only take effect on those platforms.'
+        ),
       isVisible: ({ space, resources }) => {
         if (
           !isLocationSharesActive(router, 'files-shares-with-me') &&
diff --git a/packages/web-pkg/src/composables/actions/files/useFileActionsEnableSync.ts b/packages/web-pkg/src/composables/actions/files/useFileActionsEnableSync.ts
index be19582f9ab..68185a951af 100644
--- a/packages/web-pkg/src/composables/actions/files/useFileActionsEnableSync.ts
+++ b/packages/web-pkg/src/composables/actions/files/useFileActionsEnableSync.ts
@@ -12,7 +12,7 @@ import { useMessages, useConfigStore, useResourcesStore } from '../../piniaStore
 export const useFileActionsEnableSync = () => {
   const { showMessage, showErrorMessage } = useMessages()
   const router = useRouter()
-  const { $gettext, $ngettext } = useGettext()
+  const { $gettext, $ngettext, $pgettext } = useGettext()
 
   const clientService = useClientService()
   const loadingService = useLoadingService()
@@ -82,6 +82,11 @@ export const useFileActionsEnableSync = () => {
       name: 'enable-sync',
       icon: 'check',
       handler: (args) => loadingService.addTask(() => handler(args)),
+      tooltip: () =>
+        $pgettext(
+          'Explanation tooltip for the enable sync action in files shared with me and spaces',
+          'Only affects desktop and mobile clients. You can toggle this setting here, but it will only take effect on those platforms.'
+        ),
       label: () => $gettext('Enable sync'),
       isVisible: ({ space, resources }) => {
         if (
diff --git a/packages/web-pkg/src/composables/actions/types.ts b/packages/web-pkg/src/composables/actions/types.ts
index 8683ece154a..91b0c187740 100644
--- a/packages/web-pkg/src/composables/actions/types.ts
+++ b/packages/web-pkg/src/composables/actions/types.ts
@@ -24,6 +24,8 @@ export interface Action<T = ActionOptions> {
   isExternal?: boolean
   ext?: string
 
+  tooltip?(options?: T): string
+
   label(options?: T): string
 
   isVisible(options?: T): boolean