Fix documentation (#4875)

Author: hsubox76

packages/app-check-types/index.d.ts

@@ -28,17 +28,35 @@ export interface FirebaseAppCheck {
     siteKeyOrProvider: string | AppCheckProvider,
     isTokenAutoRefreshEnabled?: boolean
   ): void;
+
+  /**
+   *
+   * @param isTokenAutoRefreshEnabled - If true, the SDK automatically
+   * refreshes App Check tokens as needed. This overrides any value set
+   * during `activate()`.
+   */
   setTokenAutoRefreshEnabled(isTokenAutoRefreshEnabled: boolean): void;
 }
 
+/**
+ * An App Check provider. This can be either the built-in reCAPTCHA provider
+ * or a custom provider. For more on custom providers, see
+ * https://firebase.google.com/docs/app-check/web-custom-provider
+ */
 interface AppCheckProvider {
   /**
-   * returns an AppCheck token
+   * Returns an AppCheck token.
    */
   getToken(): Promise<AppCheckToken>;
 }
 
+/**
+ * The token returned from an `AppCheckProvider`.
+ */
 interface AppCheckToken {
+  /**
+   * The token string in JWT format.
+   */
   readonly token: string;
   /**
    * The local timestamp after which the token will expire.

packages/firebase/index.d.ts

@@ -1469,19 +1469,46 @@ declare namespace firebase.appCheck {
   export interface AppCheck {
     /**
      * Activate AppCheck
-     * @param siteKeyOrOrovider - reCAPTCHA sitekey or custom token provider
+     * @param siteKeyOrProvider reCAPTCHA v3 site key (public key) or
+     * custom token provider.
+     * @param isTokenAutoRefreshEnabled If true, the SDK automatically
+     * refreshes App Check tokens as needed. If undefined, defaults to the
+     * value of `app.automaticDataCollectionEnabled`, which defaults to
+     * false and can be set in the app config.
+     */
+    activate(
+      siteKeyOrProvider: string | AppCheckProvider,
+      isTokenAutoRefreshEnabled?: boolean
+    ): void;
+
+    /**
+     *
+     * @param isTokenAutoRefreshEnabled If true, the SDK automatically
+     * refreshes App Check tokens as needed. This overrides any value set
+     * during `activate()`.
      */
-    activate(siteKeyOrProvider: string | AppCheckProvider): void;
+    setTokenAutoRefreshEnabled(isTokenAutoRefreshEnabled: boolean): void;
   }
 
+  /**
+   * An App Check provider. This can be either the built-in reCAPTCHA
+   * provider or a custom provider. For more on custom providers, see
+   * https://firebase.google.com/docs/app-check/web-custom-provider
+   */
   interface AppCheckProvider {
     /**
-     * returns an AppCheck token
+     * Returns an AppCheck token.
      */
     getToken(): Promise<AppCheckToken>;
   }
 
+  /**
+   * The token returned from an {@link firebase.appCheck.AppCheckProvider `AppCheckProvider`}.
+   */
   interface AppCheckToken {
+    /**
+     * The token string in JWT format.
+     */
     readonly token: string;
     /**
      * The local timestamp after which the token will expire.