Fix lint issues in a2a_protocol_test.py - remove unused imports and variables

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/tools/agent_tools/a2a_protocol_test.py

@@ -1,11 +1,8 @@
 """Test for A2A protocol support in CrewAI."""
 
-import pytest
+from unittest.mock import patch
-from unittest.mock import patch, MagicMock
 
 from crewai.agent import Agent
-from crewai.crew import Crew
-from crewai.task import Task
 from crewai.tools.agent_tools.agent_tools import AgentTools
 from crewai.tools.agent_tools.delegate_work_tool import DelegateWorkTool
 from crewai.tools.agent_tools.ask_question_tool import AskQuestionTool
@@ -14,8 +11,6 @@ from crewai.tools.base_tool import BaseTool
 
 def test_tools_passed_to_execute():
     """Test that tools are properly passed to the _execute method."""
-    original_execute = DelegateWorkTool._execute
-    
     tools_passed = {"value": False}
     
     def mock_execute(self, agent_name, task, context=None, tools=None):
@@ -59,8 +54,6 @@ def test_tools_passed_to_execute():
 
 def test_tools_passed_from_ask_question_tool():
     """Test that tools are properly passed from AskQuestionTool to _execute."""
-    original_execute = AskQuestionTool._execute
-    
     tools_passed = {"value": False}
     
     def mock_execute(self, agent_name, question, context=None, tools=None):
@@ -135,3 +128,46 @@ def test_agent_tools_injects_tools():
         assert hasattr(tool, '_agent_tools'), "Tool should have _agent_tools attribute"
         assert len(tool._agent_tools) > 0, "Tool should have agent tools injected"
         assert any(isinstance(t, CustomTool) for t in tool._agent_tools), "Custom tool should be injected"
+
+
+def test_tool_deduplication():
+    """Test that tools are deduplicated when injected into delegation tools."""
+    researcher = Agent(
+        role="researcher",
+        goal="research and analyze content",
+        backstory="You're an expert researcher",
+        allow_delegation=True,
+    )
+    
+    writer = Agent(
+        role="writer",
+        goal="write content based on research",
+        backstory="You're an expert writer",
+        allow_delegation=True,
+    )
+    
+    class CustomTool(BaseTool):
+        name: str = "Custom Tool"
+        description: str = "A custom tool for testing"
+        
+        def _run(self, *args, **kwargs):
+            return "Custom tool executed"
+    
+    # Create two instances of the same tool
+    custom_tool1 = CustomTool()
+    custom_tool2 = CustomTool()
+    
+    # Add the same tool to both agents
+    researcher.tools = [custom_tool1]
+    writer.tools = [custom_tool2]
+    
+    agent_tools = AgentTools(agents=[researcher, writer])
+    delegation_tools = agent_tools.tools()
+    
+    # Check that tools are deduplicated
+    for tool in delegation_tools:
+        assert hasattr(tool, '_agent_tools'), "Tool should have _agent_tools attribute"
+        
+        # Count instances of CustomTool
+        custom_tools = [t for t in tool._agent_tools if isinstance(t, CustomTool)]
+        assert len(custom_tools) <= 2, "Should have at most 2 instances of CustomTool"