diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2691b252..0ef51c4e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Deprecated
 ### Removed
 ### Updated APIs
+- Updated opensearch-py APIs to reflect [opensearch-api-specification@4f27c67](https://github.com/opensearch-project/opensearch-api-specification/commit/4f27c67d3f249ef9fd16ff027d7b028736f3c117)
 - Updated opensearch-py APIs to reflect [opensearch-api-specification@4615564](https://github.com/opensearch-project/opensearch-api-specification/commit/4615564b05d410575bb6ed3ed34ea136bf2e4312)
 ### Fixed
 - Fix `Transport.perform_request`'s arguments `timeout` and `ignore` variable usage ([810](https://github.com/opensearch-project/opensearch-py/pull/810))
diff --git a/opensearchpy/_async/client/indices.py b/opensearchpy/_async/client/indices.py
index 1e8125c6..99603830 100644
--- a/opensearchpy/_async/client/indices.py
+++ b/opensearchpy/_async/client/indices.py
@@ -2507,9 +2507,7 @@ async def put_index_template(
         )
 
     @query_params(
-        "cause",
         "cluster_manager_timeout",
-        "create",
         "error_trace",
         "filter_path",
         "human",
@@ -2532,15 +2530,8 @@ async def simulate_index_template(
         :arg name: Index or template name to simulate
         :arg body: New index template definition, which will be included
             in the simulation, as if it already exists in the system
-        :arg cause: User defined reason for dry-run creating the new
-            template for simulation purposes. Default is false.
         :arg cluster_manager_timeout: Operation timeout for connection
             to cluster-manager node.
-        :arg create: If `true`, the template passed in the body is only
-            used if no existing templates match the same index patterns. If `false`,
-            the simulation uses the template with the highest priority. Note that
-            the template is not permanently added or updated in either case; it is
-            only used for the simulation. Default is false.
         :arg error_trace: Whether to include the stack trace of returned
             errors. Default is false.
         :arg filter_path: Used to reduce the response. This parameter
diff --git a/opensearchpy/_async/plugins/asynchronous_search.py b/opensearchpy/_async/plugins/asynchronous_search.py
index ca4bb1fb..33e218de 100644
--- a/opensearchpy/_async/plugins/asynchronous_search.py
+++ b/opensearchpy/_async/plugins/asynchronous_search.py
@@ -119,9 +119,15 @@ async def search(
             with "-".
         :arg human: Whether to return human readable values for
             statistics. Default is True.
-        :arg index: The name of the index to be searched.
+        :arg index: The name of the index to be searched. Can be an
+            individual name, a comma-separated list of indexes, or a wildcard
+            expression of index names.
         :arg keep_alive: The amount of time that the result is saved in
-            the cluster.
+            the cluster. For example, `2d` means that the results are stored in the
+            cluster for 48 hours. The saved search results are deleted after this
+            period or if the search is canceled. Note that this includes the query
+            execution time. If the query overruns this time, the process cancels
+            this query automatically.
         :arg keep_on_completion: Whether you want to save the results in
             the cluster after the search is complete.
         :arg pretty: Whether to pretty format the returned JSON
@@ -129,7 +135,8 @@ async def search(
         :arg source: The URL-encoded request definition. Useful for
             libraries that do not accept a request body for non-POST requests.
         :arg wait_for_completion_timeout: The amount of time that you
-            plan to wait for the results.
+            plan to wait for the results. You can poll the remaining results based
+            on an ID. The maximum value is `300s`. Default is `1s`.
         """
         return await self.transport.perform_request(
             "POST",
diff --git a/opensearchpy/client/indices.py b/opensearchpy/client/indices.py
index 61a5b972..c4b2405c 100644
--- a/opensearchpy/client/indices.py
+++ b/opensearchpy/client/indices.py
@@ -2507,9 +2507,7 @@ def put_index_template(
         )
 
     @query_params(
-        "cause",
         "cluster_manager_timeout",
-        "create",
         "error_trace",
         "filter_path",
         "human",
@@ -2532,15 +2530,8 @@ def simulate_index_template(
         :arg name: Index or template name to simulate
         :arg body: New index template definition, which will be included
             in the simulation, as if it already exists in the system
-        :arg cause: User defined reason for dry-run creating the new
-            template for simulation purposes. Default is false.
         :arg cluster_manager_timeout: Operation timeout for connection
             to cluster-manager node.
-        :arg create: If `true`, the template passed in the body is only
-            used if no existing templates match the same index patterns. If `false`,
-            the simulation uses the template with the highest priority. Note that
-            the template is not permanently added or updated in either case; it is
-            only used for the simulation. Default is false.
         :arg error_trace: Whether to include the stack trace of returned
             errors. Default is false.
         :arg filter_path: Used to reduce the response. This parameter
diff --git a/opensearchpy/plugins/asynchronous_search.py b/opensearchpy/plugins/asynchronous_search.py
index f155d902..f208b8ad 100644
--- a/opensearchpy/plugins/asynchronous_search.py
+++ b/opensearchpy/plugins/asynchronous_search.py
@@ -119,9 +119,15 @@ def search(
             with "-".
         :arg human: Whether to return human readable values for
             statistics. Default is True.
-        :arg index: The name of the index to be searched.
+        :arg index: The name of the index to be searched. Can be an
+            individual name, a comma-separated list of indexes, or a wildcard
+            expression of index names.
         :arg keep_alive: The amount of time that the result is saved in
-            the cluster.
+            the cluster. For example, `2d` means that the results are stored in the
+            cluster for 48 hours. The saved search results are deleted after this
+            period or if the search is canceled. Note that this includes the query
+            execution time. If the query overruns this time, the process cancels
+            this query automatically.
         :arg keep_on_completion: Whether you want to save the results in
             the cluster after the search is complete.
         :arg pretty: Whether to pretty format the returned JSON
@@ -129,7 +135,8 @@ def search(
         :arg source: The URL-encoded request definition. Useful for
             libraries that do not accept a request body for non-POST requests.
         :arg wait_for_completion_timeout: The amount of time that you
-            plan to wait for the results.
+            plan to wait for the results. You can poll the remaining results based
+            on an ID. The maximum value is `300s`. Default is `1s`.
         """
         return self.transport.perform_request(
             "POST",