Fix function choice behavior handling in ResponsesAgentThreadActions

Author: ymuichiro

python/semantic_kernel/agents/open_ai/responses_agent_thread_actions.py

@@ -1242,10 +1242,19 @@ def _get_tools(
         if agent.tools:
             tools.extend(agent.tools)
 
-        # TODO(evmattso): make sure to respect filters on FCB
-        if kernel.plugins:
-            funcs = kernel.get_full_list_of_function_metadata()
-            tools.extend([kernel_function_metadata_to_response_function_call_format(f) for f in funcs])
+        if not function_choice_behavior.enable_kernel_functions:
+            return tools
+
+        if not kernel.plugins:
+            return tools
+
+        funcs = (
+            kernel.get_list_of_function_metadata(function_choice_behavior.filters)
+            if function_choice_behavior.filters
+            else kernel.get_full_list_of_function_metadata()
+        )
+
+        tools.extend([kernel_function_metadata_to_response_function_call_format(f) for f in funcs])
 
         return tools