diff --git a/index.d.ts b/index.d.ts
index 758d6a08..40d1cc14 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -103,7 +103,21 @@ export interface Flags {
 }
 
 export class Autocapture {
+  /**
+   * Track a screen view event.
+   *
+   * @param screenName The name of the screen being viewed. Must be non-empty;
+   *   if an empty or whitespace-only string is passed, the event is silently dropped.
+   * @param properties Optional additional properties to include with the event
+   */
   trackScreenView(screenName: string, properties?: MixpanelProperties): void;
+  /**
+   * Track a screen leave event.
+   *
+   * @param screenName The name of the screen being left. Must be non-empty;
+   *   if an empty or whitespace-only string is passed, the event is silently dropped.
+   * @param properties Optional additional properties to include with the event
+   */
   trackScreenLeave(screenName: string, properties?: MixpanelProperties): void;
 }
 
diff --git a/index.js b/index.js
index 2c0106c7..f355ccde 100644
--- a/index.js
+++ b/index.js
@@ -726,7 +726,8 @@ export class Autocapture {
   /**
    * Track a screen view event.
    *
-   * @param {string} screenName The name of the screen being viewed
+   * @param {string} screenName The name of the screen being viewed. Must be non-empty;
+   *   if an empty or whitespace-only string is passed, the event is silently dropped.
    * @param {object} properties Optional additional properties to include with the event
    */
   trackScreenView(screenName, properties) {
@@ -750,7 +751,8 @@ export class Autocapture {
   /**
    * Track a screen leave event.
    *
-   * @param {string} screenName The name of the screen being left
+   * @param {string} screenName The name of the screen being left. Must be non-empty;
+   *   if an empty or whitespace-only string is passed, the event is silently dropped.
    * @param {object} properties Optional additional properties to include with the event
    */
   trackScreenLeave(screenName, properties) {