Fix #2698: Implement MCP SSE server connection for tools

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

tests/integration/test_mcp_tools_integration.py

@@ -0,0 +1,41 @@
+import os
+import unittest
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from crewai.tools import BaseTool, MCPToolConnector, Tool
+
+
+@pytest.mark.integration
+class TestMCPToolsIntegration(unittest.TestCase):
+    @pytest.mark.skipif(
+        not os.environ.get("CREWAI_INTEGRATION_TEST"),
+        reason="Integration test requires CREWAI_INTEGRATION_TEST=true"
+    )
+    @patch("crewai.tools.mcp_connector.SSEClient")
+    def test_mcp_tool_connector_integration(self, mock_sse_client):
+        def add(a: int, b: int) -> int:
+            """Add two numbers."""
+            return a + b
+            
+        calculator_tool = Tool(
+            name="calculator_add",
+            description="Add two numbers",
+            func=add
+        )
+        
+        connector = MCPToolConnector(tools=[calculator_tool])
+        
+        mock_sse = MagicMock()
+        mock_sse_client.return_value = mock_sse
+        
+        connector.connect()
+        
+        tool_request_data = {
+            "tool_name": "calculator_add",
+            "arguments": {"a": 5, "b": 7},
+            "request_id": "test-request-1"
+        }
+        
+        connector._handle_tool_request(tool_request_data)