[Security solution] [Endpoint] Adds documentation for exceptions container summary

docs/detections/api/exceptions-api-index.asciidoc

@@ -14,6 +14,8 @@ include::exceptions/api-get-exception-items.asciidoc[]
 
 include::exceptions/api-update-exception-container.asciidoc[]
 
+include::exceptions/api-summary-exception-container.asciidoc[]
+
 include::exceptions/api-update-exception-item.asciidoc[]
 
 include::exceptions/api-delete-exception-container.asciidoc[]

docs/detections/api/exceptions/api-summary-exception-container.asciidoc

@@ -0,0 +1,64 @@
+[[exceptions-api-summary-exception-container]]
+=== Summary exception container
+
+Retrieves an exception container summary.
+
+NOTE: Console supports only Elasticsearch APIs. You cannot interact with {kib} APIs with Console and must use `curl` or another HTTP tool instead. For more information, refer to https://www.elastic.co/guide/en/kibana/current/console-kibana.html[Console].
+
+==== Request URL
+
+`POST <kibana host>:<port>/api/exception_lists/summary`
+
+==== Request body
+
+A JSON object with these fields:
+
+[width="100%",options="header"]
+|==============================================
+|Name |Type |Description |Required
+
+|`id` |String |Exception container ID. |Yes
+|`list_id` |String |Unique identifier. |Yes
+|`namespace_type` |String a|Determines whether the exception container is available in all {kib} spaces or just the space in which it is created, where:
+
+* `single`: Only available in the {kib} space in which it is created.
+* `agnostic`: Available in all {kib} spaces.
+
+|Yes
+
+|==============================================
+
+===== Example requests
+
+Gets the summary from an exception container:
+
+[source,console]
+--------------------------------------------------
+GET api/exception_lists/summary
+{
+ "id": "allowes-process-id",
+ "list_id": "allowed-processes",
+ "namespace_type": "single",
+}
+--------------------------------------------------
+// KIBANA
+
+==== Response code
+
+`200`::
+ Indicates a successful call.
+
+
+==== Response payload
+
+A summary of the exception container:
+
+[source,json]
+--------------------------------------------------
+{
+ windows: 1,
+ linux: 3,
+ macos: 2,
+ total: 6,
+}
+--------------------------------------------------