diff --git a/packages/element-web-module-api/element-web-module-api.api.md b/packages/element-web-module-api/element-web-module-api.api.md
index cbe082c791..c01f2e90fa 100644
--- a/packages/element-web-module-api/element-web-module-api.api.md
+++ b/packages/element-web-module-api/element-web-module-api.api.md
@@ -51,7 +51,6 @@ export interface Api extends LegacyModuleApiExtension, LegacyCustomisationsApiEx
 
 // @alpha
 export interface BuiltinsApi {
-    // (undocumented)
     getRoomViewComponent(): React.ComponentType<RoomViewProps>;
 }
 
@@ -329,17 +328,11 @@ export type RuntimeModuleConstructor = new (api: ModuleApi) => RuntimeModule;
 
 // @alpha
 export interface SpacePanelItemProps {
-    // (undocumented)
     className?: string;
-    // (undocumented)
     contextMenuTooltip?: string;
-    // (undocumented)
     icon?: JSX.Element;
-    // (undocumented)
     label: string;
-    // (undocumented)
     onSelected?(): void;
-    // (undocumented)
     style?: React.CSSProperties;
 }
 
diff --git a/packages/element-web-module-api/src/api/builtins.ts b/packages/element-web-module-api/src/api/builtins.ts
index ee75fad50e..68ab7a39e2 100644
--- a/packages/element-web-module-api/src/api/builtins.ts
+++ b/packages/element-web-module-api/src/api/builtins.ts
@@ -21,5 +21,12 @@ export interface RoomViewProps {
  * @alpha
  */
 export interface BuiltinsApi {
+    /**
+     * Returns the RoomView component used by Element Web to render a room such that
+     * modules can render it as part of their own custom room views.
+     *
+     * @alpha
+     * @returns The RoomView component.
+     */
     getRoomViewComponent(): React.ComponentType<RoomViewProps>;
 }
diff --git a/packages/element-web-module-api/src/api/extras.ts b/packages/element-web-module-api/src/api/extras.ts
index 6da5aa7848..ddef7b7c20 100644
--- a/packages/element-web-module-api/src/api/extras.ts
+++ b/packages/element-web-module-api/src/api/extras.ts
@@ -12,12 +12,34 @@ import { JSX } from "react";
  * @alpha
  */
 export interface SpacePanelItemProps {
+    /**
+     * A CSS class name for the item
+     */
     className?: string;
+
+    /**
+     * An icon to show in the item
+     */
     icon?: JSX.Element;
+
+    /**
+     * The label to show in the item
+     */
     label: string;
+
+    /**
+     * A tooltip to show when hovering over the item
+     */
     contextMenuTooltip?: string;
+
+    /**
+     * Styles to apply to the item
+     */
     style?: React.CSSProperties;
-    //notificationState?: NotificationState;
+
+    /**
+     * Callback when the item is selected
+     */
     onSelected?(): void;
 }