Fix type validation error in hierarchical process delegation (Issue #2606)

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

tests/tools/agent_tools/test_delegate_work_tool_dict_input.py

@@ -0,0 +1,37 @@
+"""Test delegate work tool with dictionary inputs."""
+
+import pytest
+
+from crewai.agent import Agent
+from crewai.tools.agent_tools.agent_tools import AgentTools
+
+researcher = Agent(
+    role="researcher",
+    goal="make the best research and analysis on content about AI and AI agents",
+    backstory="You're an expert researcher, specialized in technology",
+    allow_delegation=False,
+)
+tools = AgentTools(agents=[researcher]).tools()
+delegate_tool = tools[0]
+
+
+@pytest.mark.vcr(filter_headers=["authorization"])
+def test_delegate_work_with_dict_input():
+    """Test that the delegate work tool can handle dictionary inputs."""
+    task_dict = {
+        "description": "share your take on AI Agents",
+        "goal": "provide comprehensive analysis"
+    }
+    context_dict = {
+        "background": "I heard you hate them",
+        "additional_info": "We need this for a report"
+    }
+    
+    result = delegate_tool.run(
+        coworker="researcher",
+        task=task_dict,
+        context=context_dict,
+    )
+    
+    assert isinstance(result, str)
+    assert len(result) > 0