chore: Hide the ask_data_insights tool until the API is publicly available

PiperOrigin-RevId: 789806535

tests/unittests/tools/bigquery/test_bigquery_toolset.py

@@ -34,7 +34,7 @@ async def test_bigquery_toolset_tools_default():
   tools = await toolset.get_tools()
   assert tools is not None
 
-  assert len(tools) == 6
+  assert len(tools) == 5
   assert all([isinstance(tool, BigQueryTool) for tool in tools])
 
   expected_tool_names = set([
@@ -43,7 +43,6 @@ async def test_bigquery_toolset_tools_default():
       "list_table_ids",
       "get_table_info",
       "execute_sql",
-      "ask_data_insights",
   ])
   actual_tool_names = set([tool.name for tool in tools])
   assert actual_tool_names == expected_tool_names