refactor:

- changed method get_agent_tools for only get_tools on agent interface
- changed OllamaModelManager to correc semantic OllamaService

test:
- added test for service initialization
- added tests to list tools and create tools into  PDF agent

test/agent/test_pdfAgent.py

@@ -3,18 +3,34 @@ import unittest
 
 from src.interfaces.agents.agent import Agent
 from src.modules.pdf.pdfAgent import PDFAgent
+from src.modules.pdf.tools.metadataPDFTool import PDFMetadataTool 
 
 class TestPDFAgent(unittest.TestCase):
     def setUp(self):
-        self.agent: Agent
+        self.agent: Agent = PDFAgent()
         return super().setUp()
     
     
-    def createAgent(self):
-        self.agent = PDFAgent()
-        self.agent.createAgent()
-        self.assertIsNone(self.agent)
+    def test_createAgent(self):
+        self.assertIsInstance(self.agent, Agent)
         self.assertEqual(self.agent.name, "PDF Agent")
         self.assertEqual(self.agent.description, "Agent to handle PDF operations")
         
         self.assertIsInstance(self.agent.tools, list)
+        
+    def test_list_tools(self):
+        self.assertEqual(self.agent.list_tools(), [])
+        
+    def test_create_tools(self):
+        metadataTool = PDFMetadataTool()
+        self.assertIsInstance(metadataTool, PDFMetadataTool)
+        self.assertEqual(metadataTool.name, "PDF Metadata Tool")
+        
+        self.agent.add_tool(metadataTool)
+        tools = self.agent.get_tools()
+        
+        self.assertEqual(tools, [metadataTool])
+        self.assertEqual(len(self.agent.tools), 1)
+        self.assertEqual(self.agent.tools[0].name, "PDF Metadata Tool")
+        
+    # def test_