Fix type-checker issues in SSE client and MCP connector

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

src/crewai/tools/mcp_connector.py

@@ -31,7 +31,7 @@ class MCPToolConnector:
 
     def connect(self) -> None:
         """Connect to the MCP SSE server for tools."""
-        token = self.token_manager.get_access_token()
+        token = self.token_manager.get_token()
         if not token:
             self.logger.error("Authentication token not found. Please log in first.")
             raise ValueError("Authentication token not found. Please log in first.")

src/crewai/utilities/sse_client.py

@@ -78,9 +78,9 @@ class SSEClient:
                 stream=True,
                 timeout=self.timeout
             )
-            self._response.raise_for_status()
+            if self._response is not None:
-            
+                self._response.raise_for_status()
-            self._client = sseclient.SSEClient(self._response)
+                self._client = sseclient.SSEClient(self._response)
             
         except Exception as e:
             self.logger.error(f"Error connecting to SSE server: {str(e)}")
@@ -93,7 +93,7 @@ class SSEClient:
             )
             raise
 
-    def listen(self, event_handlers: Dict[str, Callable[[Any], None]] = None) -> None:
+    def listen(self, event_handlers: Optional[Dict[str, Callable[[Any], None]]] = None) -> None:
         """Listen for SSE events and process them with registered handlers.
         
         Args:
@@ -105,6 +105,10 @@ class SSEClient:
         event_handlers = event_handlers or {}
         
         try:
+            if self._client is None:
+                self.logger.error("SSE client is not initialized")
+                return
+                
             for event in self._client:
                 event_type = event.event or "message"
                 data = None