docs: add MCP client usage examples

tests/unit/test_mcp.py

@@ -4,9 +4,17 @@ from agentic_security.mcp.client import run
 
 
 @pytest.mark.asyncio
-async def test_mcp_echo_tool():
-    """Test the echo tool functionality"""
+async def test_mcp_client_lists_agentic_security_tools():
+    """Test that the MCP client can discover the server tools."""
     prompts, resources, tools = await run()
-    assert prompts
-    assert resources
-    assert tools
+    tool_names = {tool.name for tool in tools.tools}
+
+    assert prompts is not None
+    assert resources is not None
+    assert {
+        "verify_llm",
+        "start_scan",
+        "stop_scan",
+        "get_data_config",
+        "get_spec_templates",
+    }.issubset(tool_names)