make eval functions async

PiperOrigin-RevId: 756106627

src/google/adk/evaluation/evaluation_generator.py

@@ -32,7 +32,7 @@ class EvaluationGenerator:
   """Generates evaluation responses for agents."""
 
   @staticmethod
-  def generate_responses(
+  async def generate_responses(
       eval_dataset,
       agent_module_path,
       repeat_num=3,
@@ -107,7 +107,7 @@ class EvaluationGenerator:
     )
 
   @staticmethod
-  def _process_query_with_root_agent(
+  async def _process_query_with_root_agent(
       data,
       root_agent,
       reset_func,
@@ -128,7 +128,7 @@ class EvaluationGenerator:
           all_mock_tools.add(expected[EvalConstants.TOOL_NAME])
 
     eval_data_copy = data.copy()
-    EvaluationGenerator.apply_before_tool_callback(
+    await EvaluationGenerator.apply_before_tool_callback(
         root_agent,
         lambda *args: EvaluationGenerator.before_tool_callback(
             *args, eval_dataset=eval_data_copy
@@ -247,7 +247,7 @@ class EvaluationGenerator:
     return None
 
   @staticmethod
-  def apply_before_tool_callback(
+  async def apply_before_tool_callback(
       agent: BaseAgent,
       callback: BeforeToolCallback,
       all_mock_tools: set[str],
@@ -265,6 +265,6 @@ class EvaluationGenerator:
 
     # Apply recursively to subagents if they exist
     for sub_agent in agent.sub_agents:
-      EvaluationGenerator.apply_before_tool_callback(
+      await EvaluationGenerator.apply_before_tool_callback(
           sub_agent, callback, all_mock_tools
       )