update site search functionality

Author: ethanpalm

guides/assistant.mdx

@@ -30,19 +30,34 @@ You can view assistant usage through your dashboard to understand user behavior
 
 The assistant is enabled by default for Pro and Custom plans. You can manage the assistant from your [dashboard](https://dashboard.mintlify.com/products/assistant/settings), including enabling or disabling it, configuring response handling, and setting a spend limit.
 
-### Enable or disable the assistant
+### Assistant status
 
 Toggle the assistant status to enable or disable the assistant for your documentation site.
 
-### Response handling
+### Assistant deflection
 
-Configure how the assistant responds when it cannot find answers in your documentation. You can redirect unanswered questions to your support team and enable the assistant to search external websites.
+Enable the assistant to redirect unanswered questions to your support team. Provide an email address that the assistant will provide to users who ask questions that it cannot answer.
 
-- **Assistant Deflection**: When enabled, the assistant directs users to your support team for questions that it cannot answer.
-- **Search Sites**: The assistant can search specified external sites for additional context when answering questions.
-  <Note>
-    Site search is in beta. To enable it for your documentation site, [contact our sales team](mailto:[email protected]). 
-  </Note>
+### Search sites
+
+<Note>
+  Site search is in beta. To enable it for your documentation site, [contact our sales team](mailto:[email protected]). 
+</Note>
+
+Configure sites that the assistant can search for additional context when answering questions.
+
+- Sites must be publicly available.
+- Sites that require JavaScript to load are not supported.
+
+You can use Exa's [filtering syntax](https://docs.exa.ai/changelog/domain-path-filter) when you configure external sites.
+
+- **Domain-level filtering**
+  - `example.com`: Search the entire domain
+  - `docs.example.com`: Search only the docs subdomain
+- **Path-level filtering**
+  - `docs.example.com/api/*`: Only search API documentation sections
+- **Multiple patterns**
+  - You can add multiple entries to target different sections across sites for more granular control over what external content the assistant can reference.
 
 ### Spend limit