Address code review feedback: rename test and improve docstring

Co-authored-by: nikhilNava <211831449+nikhilNava@users.noreply.github.com>

Author: Copilot

libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/exporters/agent365_exporter.py

@@ -173,6 +173,13 @@ def _build_url(self, endpoint: str, agent_id: str) -> str:
 
         If the endpoint has a scheme (http:// or https://), use it as-is.
         Otherwise, prepend https://.
+
+        Args:
+            endpoint: Base endpoint URL or domain.
+            agent_id: The agent identifier to include in the URL path.
+
+        Returns:
+            The fully constructed export URL with path and query parameters.
         """
         endpoint_path = (
             f"/maven/agent365/service/agents/{agent_id}/traces"

tests/observability/core/test_agent365_exporter.py

@@ -136,8 +136,8 @@ def test_export_success(self):
             len(request_data["resourceSpans"][0]["scopeSpans"][0]["spans"]), 2
         )  # Two spans
 
-    def test_export_failure_with_retries(self):
-        """Test 2: Test export failure with fallback to IL tenant endpoint."""
+    def test_export_fails_after_default_and_fallback_attempts(self):
+        """Test export failure when both default and IL tenant fallback endpoints fail."""
         # Arrange
         spans = [self._create_mock_span("failed_span")]