diff --git a/consumer/src/tree.rs b/consumer/src/tree.rs
index 0b99e2d99..75f227c74 100644
--- a/consumer/src/tree.rs
+++ b/consumer/src/tree.rs
@@ -559,12 +559,15 @@ impl State {
         None
     }
 
-    pub fn toolkit_name(&self) -> Option<&str> {
-        self.data.toolkit_name.as_deref()
+    pub fn toolkit_name(&self) -> &str {
+        self.data.toolkit_name.as_deref().unwrap_or("AccessKit")
     }
 
     pub fn toolkit_version(&self) -> Option<&str> {
-        self.data.toolkit_version.as_deref()
+        self.data
+            .toolkit_version
+            .as_deref()
+            .filter(|_| self.data.toolkit_name.is_some())
     }
 
     pub fn locate_node(&self, node_id: NodeId) -> Option<(LocalNodeId, TreeId)> {
@@ -3135,4 +3138,50 @@ mod tests {
         assert_eq!(handler.old_focus, Some(node_id(2)));
         assert_eq!(handler.new_focus, Some(node_id(3)));
     }
+
+    fn tree_with_toolkit_info(name: Option<&str>, version: Option<&str>) -> super::Tree {
+        let mut tree_data = Tree::new(LocalNodeId(0));
+        tree_data.toolkit_name = name.map(Into::into);
+        tree_data.toolkit_version = version.map(Into::into);
+        let update = TreeUpdate {
+            nodes: vec![(LocalNodeId(0), Node::new(Role::Window))],
+            tree: Some(tree_data),
+            tree_id: TreeId::ROOT,
+            focus: LocalNodeId(0),
+        };
+        super::Tree::new(update, false)
+    }
+
+    #[test]
+    fn toolkit_info_is_reported_when_both_name_and_version_are_set() {
+        let tree = tree_with_toolkit_info(Some("egui"), Some("0.30.0"));
+        let state = tree.state();
+        assert_eq!("egui", state.toolkit_name());
+        assert_eq!(Some("0.30.0"), state.toolkit_version());
+    }
+
+    #[test]
+    fn toolkit_version_is_none_when_only_name_is_set() {
+        let tree = tree_with_toolkit_info(Some("egui"), None);
+        let state = tree.state();
+        assert_eq!("egui", state.toolkit_name());
+        assert_eq!(None, state.toolkit_version());
+    }
+
+    #[test]
+    fn toolkit_name_falls_back_to_accesskit_when_unset() {
+        let tree = tree_with_toolkit_info(None, None);
+        let state = tree.state();
+        assert_eq!("AccessKit", state.toolkit_name());
+        assert_eq!(None, state.toolkit_version());
+    }
+
+    #[test]
+    fn toolkit_version_is_suppressed_when_name_is_unset() {
+        // A version without a name would be misreported as the version of AccessKit.
+        let tree = tree_with_toolkit_info(None, Some("0.30.0"));
+        let state = tree.state();
+        assert_eq!("AccessKit", state.toolkit_name());
+        assert_eq!(None, state.toolkit_version());
+    }
 }
diff --git a/platforms/atspi-common/src/adapter.rs b/platforms/atspi-common/src/adapter.rs
index da028d2d5..6b7db3c35 100644
--- a/platforms/atspi-common/src/adapter.rs
+++ b/platforms/atspi-common/src/adapter.rs
@@ -458,7 +458,7 @@ impl Adapter {
             let tree = self.context.read_tree();
             let tree_state = tree.state();
             let mut app_context = self.context.write_app_context();
-            app_context.toolkit_name = tree_state.toolkit_name().map(|s| s.to_string());
+            app_context.toolkit_name = Some(tree_state.toolkit_name().to_string());
             app_context.toolkit_version = tree_state.toolkit_version().map(|s| s.to_string());
             let adapter_index = app_context.adapter_index(self.id).unwrap();
             let root = tree_state.root();
diff --git a/platforms/atspi-common/src/node.rs b/platforms/atspi-common/src/node.rs
index c930ccc1e..ce197b15e 100644
--- a/platforms/atspi-common/src/node.rs
+++ b/platforms/atspi-common/src/node.rs
@@ -803,7 +803,7 @@ impl PlatformNode {
     }
 
     pub fn toolkit_name(&self) -> Result<String> {
-        self.with_tree_state(|state| Ok(state.toolkit_name().unwrap_or_default().to_string()))
+        self.with_tree_state(|state| Ok(state.toolkit_name().to_string()))
     }
 
     pub fn toolkit_version(&self) -> Result<String> {
diff --git a/platforms/windows/src/node.rs b/platforms/windows/src/node.rs
index 1809f50b5..41cb62bd9 100644
--- a/platforms/windows/src/node.rs
+++ b/platforms/windows/src/node.rs
@@ -1035,10 +1035,7 @@ impl IRawElementProviderSimple_Impl for PlatformNode_Impl {
                 }
                 match property_id {
                     UIA_FrameworkIdPropertyId => {
-                        result = state
-                            .toolkit_name()
-                            .map(|s| StrWrapper::new(s, &mut buffer))
-                            .into()
+                        result = StrWrapper::new(state.toolkit_name(), &mut buffer).into()
                     }
                     UIA_ProviderDescriptionPropertyId => {
                         result = toolkit_description(state, &mut buffer).into()
diff --git a/platforms/windows/src/util.rs b/platforms/windows/src/util.rs
index d9d323bc2..b6e4d36f3 100644
--- a/platforms/windows/src/util.rs
+++ b/platforms/windows/src/util.rs
@@ -413,16 +413,14 @@ pub(crate) fn window_title(hwnd: WindowHandle, buffer: &mut Vec<u16>) -> Option<
 pub(crate) fn toolkit_description<'a>(
     state: &TreeState,
     buffer: &'a mut Vec<u16>,
-) -> Option<WideString<'a>> {
-    state.toolkit_name().map(|name| {
-        let mut result = WideString::new(buffer);
-        result.write_str(name).unwrap();
-        if let Some(version) = state.toolkit_version() {
-            result.write_char(' ').unwrap();
-            result.write_str(version).unwrap();
-        }
-        result
-    })
+) -> WideString<'a> {
+    let mut result = WideString::new(buffer);
+    result.write_str(state.toolkit_name()).unwrap();
+    if let Some(version) = state.toolkit_version() {
+        result.write_char(' ').unwrap();
+        result.write_str(version).unwrap();
+    }
+    result
 }
 
 pub(crate) fn upgrade<T>(weak: &Weak<T>) -> Result<Arc<T>> {