diff --git a/src/agents/tools/nodes-tool.test.ts b/src/agents/tools/nodes-tool.test.ts
index 274e6c4e05d..33f306e2676 100644
--- a/src/agents/tools/nodes-tool.test.ts
+++ b/src/agents/tools/nodes-tool.test.ts
@@ -320,4 +320,21 @@ describe("createNodesTool screen_record duration guardrails", () => {
       }),
     ).rejects.toThrow('invokeCommand "system.run" is reserved for shell execution');
   });
+
+  it("keeps invoke pairing guidance for scope upgrade rejections", async () => {
+    gatewayMocks.callGatewayTool.mockRejectedValueOnce(
+      new Error("scope upgrade pending approval (requestId: req-123)"),
+    );
+    const tool = createNodesTool();
+
+    await expect(
+      tool.execute("call-1", {
+        action: "invoke",
+        node: "macbook",
+        invokeCommand: "device.status",
+      }),
+    ).rejects.toThrow(
+      "pairing required before node invoke. Approve pairing request req-123 and retry.",
+    );
+  });
 });
diff --git a/src/agents/tools/nodes-tool.ts b/src/agents/tools/nodes-tool.ts
index d020d233d3b..154ae6bd006 100644
--- a/src/agents/tools/nodes-tool.ts
+++ b/src/agents/tools/nodes-tool.ts
@@ -2,9 +2,9 @@ import crypto from "node:crypto";
 import { Type } from "@sinclair/typebox";
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
 import type { OperatorScope } from "../../gateway/method-scopes.js";
+import { readConnectPairingRequiredMessage } from "../../gateway/protocol/connect-error-details.js";
 import { formatErrorMessage } from "../../infra/errors.js";
 import { resolveNodePairApprovalScopes } from "../../infra/node-pairing-authz.js";
-import { normalizeLowercaseStringOrEmpty } from "../../shared/string-coerce.js";
 import type { GatewayMessageChannel } from "../../utils/message-channel.js";
 import { resolveSessionAgentId } from "../agent-scope.js";
 import { resolveImageSanitizationLimits } from "../image-sanitization.js";
@@ -74,20 +74,6 @@ async function resolveNodePairApproveScopes(
   return resolveApproveScopes(match?.commands);
 }
 
-function isPairingRequiredMessage(message: string): boolean {
-  const lower = normalizeLowercaseStringOrEmpty(message);
-  return lower.includes("pairing required") || lower.includes("not_paired");
-}
-
-function extractPairingRequestId(message: string): string | null {
-  const match = message.match(/\(requestId:\s*([^)]+)\)/i);
-  if (!match) {
-    return null;
-  }
-  const value = (match[1] ?? "").trim();
-  return value.length > 0 ? value : null;
-}
-
 // Flattened schema: runtime validates per-action requirements.
 const NodesToolSchema = Type.Object({
   action: stringEnum(NODES_TOOL_ACTIONS),
@@ -307,8 +293,9 @@ export function createNodesTool(options?: {
             : "default";
         const agentLabel = agentId ?? "unknown";
         let message = formatErrorMessage(err);
-        if (action === "invoke" && isPairingRequiredMessage(message)) {
-          const requestId = extractPairingRequestId(message);
+        const pairing = action === "invoke" ? readConnectPairingRequiredMessage(message) : null;
+        if (pairing) {
+          const requestId = pairing.requestId ?? null;
           const approveHint = requestId
             ? `Approve pairing request ${requestId} and retry.`
             : "Approve the pending pairing request and retry.";