diff --git a/backend/app/extensions/runtime.py b/backend/app/extensions/runtime.py
index a6f0730..6a5e918 100644
--- a/backend/app/extensions/runtime.py
+++ b/backend/app/extensions/runtime.py
@@ -633,6 +633,7 @@ class PluginRuntime:
                                         "command_id": _spec.command_id,
                                         "arguments": arguments,
                                         "context": context,
+                                        "settings": settings,
                                         "secrets": secret_values,
                                     }
                                 },
diff --git a/backend/extensions/fixtures/mcp-echo/server.py b/backend/extensions/fixtures/mcp-echo/server.py
index ba61194..f9d480f 100644
--- a/backend/extensions/fixtures/mcp-echo/server.py
+++ b/backend/extensions/fixtures/mcp-echo/server.py
@@ -71,8 +71,10 @@ def call_tool(request_id: int, params: dict[str, Any]) -> None:
         envelope = arguments.get("_notesagent") or {}
         command_arguments = envelope.get("arguments") or {}
         context = envelope.get("context") or {}
+        settings = envelope.get("settings") or {}
         secrets = envelope.get("secrets") or {}
         message = command_arguments.get("message") or context.get("selection") or ""
+        message = f"{settings.get('message_prefix', '')}{message}"
         respond(
             request_id,
             {
diff --git a/backend/extensions/fixtures/mcp-echo/settings.yaml b/backend/extensions/fixtures/mcp-echo/settings.yaml
index dfc3aa9..3ddb40e 100644
--- a/backend/extensions/fixtures/mcp-echo/settings.yaml
+++ b/backend/extensions/fixtures/mcp-echo/settings.yaml
@@ -1,6 +1,10 @@
 section_id: mcp-fixture.general
 schema_version: 1
 fields:
+  - key: message_prefix
+    label: Message Prefix
+    type: string
+    default: ""
   - key: api_key
     label: Fixture API Key
     type: secret
diff --git a/backend/tests/test_extension_core.py b/backend/tests/test_extension_core.py
index 25539b8..b96f648 100644
--- a/backend/tests/test_extension_core.py
+++ b/backend/tests/test_extension_core.py
@@ -415,6 +415,9 @@ def test_mcp_command_target_receives_scoped_context_and_declared_secret(
         mcp_container.plugins.put_setting_secret(
             "mcp-fixture", "api_key", "mcp-command-secret"
         )
+        mcp_container.plugins.update_settings(
+            "mcp-fixture", 1, {"message_prefix": "Fixture: "}
+        )
         result = await mcp_container.plugins.execute_command(
             "mcp-fixture.notify",
             {},
@@ -427,7 +430,7 @@ def test_mcp_command_target_receives_scoped_context_and_declared_secret(
         assert result.effect.type == "notification"
         assert result.effect.payload == {
             "level": "success",
-            "message": "来自选区",
+            "message": "Fixture: 来自选区",
             "secret_configured": True,
         }
         assert "mcp-command-secret" not in repr(