[AI] [Agents] correct convenience doc string for Bing Grounding (#41150)

* [AI] [Agents] correct convenience doc string for BIng Grounding

* Update sdk/ai/azure-ai-agents/azure/ai/agents/models/_patch.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* update local variable name

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: glharper

sdk/ai/azure-ai-agents/azure/ai/agents/models/_patch.py

@@ -848,15 +848,18 @@ class BingGroundingTool(Tool[BingGroundingToolDefinition]):
 
     def __init__(self, connection_id: str, market: str = "", set_lang: str = "", count: int = 5, freshness: str = ""):
         """
-        Initialize Bing Custom Search with a connection_id.
-
-        :param connection_id: Connection ID used by tool. Bing Custom Search tools allow only one connection.
-        :param market:
-        :param set_lang:
-        :param count:
-        :param freshness:
-        """
-        self.connection_ids = [
+        Initialize Bing Grounding tool with a connection_id.
+
+        :param connection_id: Connection ID used by tool. Bing Grounding tools allow only one connection.
+        :param market: The market where the results come from.
+        :param set_lang: The language to use for user interface strings when calling Bing API.
+        :param count: The number of search results to return in the Bing API response.
+        :param freshness: Filter search results by a specific time range.
+        
+        .. seealso:: 
+           `Bing Web Search API Query Parameters <https://learn.microsoft.com/bing/search-apis/bing-web-search/reference/query-parameters>`_
+        """
+        self._search_configurations = [
             BingGroundingSearchConfiguration(
                 connection_id=connection_id, market=market, set_lang=set_lang, count=count, freshness=freshness
             )
@@ -871,7 +874,7 @@ def definitions(self) -> List[BingGroundingToolDefinition]:
         """
         return [
             BingGroundingToolDefinition(
-                bing_grounding=BingGroundingSearchToolParameters(search_configurations=self.connection_ids)
+                bing_grounding=BingGroundingSearchToolParameters(search_configurations=self._search_configurations)
             )
         ]