diff --git a/src/plugins/contracts/trusted-tool-policy-registration.contract.test.ts b/src/plugins/contracts/trusted-tool-policy-registration.contract.test.ts
new file mode 100644
index 000000000000..1bfd4e43f25c
--- /dev/null
+++ b/src/plugins/contracts/trusted-tool-policy-registration.contract.test.ts
@@ -0,0 +1,82 @@
+// Trusted tool policy registration tests cover plugin-owned evaluator snapshotting.
+import {
+  createPluginRegistryFixture,
+  registerTestPlugin,
+} from "openclaw/plugin-sdk/plugin-test-contracts";
+import { afterEach, describe, expect, it } from "vitest";
+import type { PluginTrustedToolPolicyRegistration } from "../host-hooks.js";
+import { createEmptyPluginRegistry } from "../registry-empty.js";
+import { setActivePluginRegistry } from "../runtime.js";
+import { createPluginRecord } from "../status.test-helpers.js";
+import { runTrustedToolPolicies } from "../trusted-tool-policy.js";
+
+describe("plugin trusted tool policy registration", () => {
+  afterEach(() => {
+    setActivePluginRegistry(createEmptyPluginRegistry());
+  });
+
+  it("snapshots policy evaluators before trusted tool policy execution", async () => {
+    let idReads = 0;
+    let descriptionReads = 0;
+    let evaluateReads = 0;
+    const evaluatedTools: string[] = [];
+    const { config, registry } = createPluginRegistryFixture();
+    registerTestPlugin({
+      registry,
+      config,
+      record: createPluginRecord({
+        id: "volatile-trusted-policy",
+        name: "Volatile Trusted Policy",
+        origin: "bundled",
+      }),
+      register(api) {
+        api.registerTrustedToolPolicy({
+          get id() {
+            idReads += 1;
+            if (idReads > 1) {
+              throw new Error("policy id getter re-read");
+            }
+            return "policy";
+          },
+          get description() {
+            descriptionReads += 1;
+            if (descriptionReads > 1) {
+              throw new Error("policy description getter re-read");
+            }
+            return "Policy";
+          },
+          get evaluate() {
+            evaluateReads += 1;
+            if (evaluateReads > 1) {
+              throw new Error("policy evaluate getter re-read");
+            }
+            return (event) => {
+              evaluatedTools.push(event.toolName);
+              return { block: true, blockReason: "blocked by stored policy" };
+            };
+          },
+        } as PluginTrustedToolPolicyRegistration);
+      },
+    });
+    setActivePluginRegistry(registry.registry);
+
+    expect(registry.registry.trustedToolPolicies?.[0]?.policy.description).toBe("Policy");
+    expect(idReads).toBe(1);
+    expect(descriptionReads).toBe(1);
+    expect(evaluateReads).toBe(1);
+
+    await expect(
+      runTrustedToolPolicies(
+        { toolName: "dangerous_tool", params: {} },
+        { toolName: "dangerous_tool" },
+      ),
+    ).resolves.toEqual({
+      block: true,
+      blockReason: "blocked by stored policy",
+    });
+    expect(evaluatedTools).toEqual(["dangerous_tool"]);
+    expect(idReads).toBe(1);
+    expect(descriptionReads).toBe(1);
+    expect(evaluateReads).toBe(1);
+  });
+});
diff --git a/src/plugins/registry.ts b/src/plugins/registry.ts
index 21fc5ce98f03..c81ebce60053 100644
--- a/src/plugins/registry.ts
+++ b/src/plugins/registry.ts
@@ -2190,6 +2190,38 @@ export function createPluginRegistry(registryParams: PluginRegistryParams) {
     });
   };
 
+  const readTrustedToolPolicyFields = (
+    record: PluginRecord,
+    policy: PluginTrustedToolPolicyRegistration,
+  ):
+    | {
+        id: unknown;
+        description: unknown;
+        evaluate: unknown;
+      }
+    | undefined => {
+    let id: unknown;
+    try {
+      id = policy.id;
+      return {
+        id,
+        description: policy.description,
+        evaluate: policy.evaluate,
+      };
+    } catch (error) {
+      const normalizedId = normalizeOptionalHostHookString(id);
+      pushDiagnostic({
+        level: "error",
+        pluginId: record.id,
+        source: record.source,
+        message:
+          `trusted tool policy registration has unreadable fields` +
+          `${normalizedId ? `: ${normalizedId}` : ""}: ${formatErrorMessage(error)}`,
+      });
+      return undefined;
+    }
+  };
+
   const registerTrustedToolPolicy = (
     record: PluginRecord,
     policy: PluginTrustedToolPolicyRegistration,
@@ -2203,9 +2235,14 @@ export function createPluginRegistry(registryParams: PluginRegistryParams) {
       });
       return;
     }
-    const id = normalizeHostHookString(policy.id);
-    const description = normalizeHostHookString(policy.description);
-    if (!id || !description || typeof policy.evaluate !== "function") {
+    const fields = readTrustedToolPolicyFields(record, policy);
+    if (!fields) {
+      return;
+    }
+    const id = normalizeHostHookString(fields.id);
+    const description = normalizeHostHookString(fields.description);
+    const evaluate = fields.evaluate;
+    if (!id || !description || typeof evaluate !== "function") {
       pushDiagnostic({
         level: "error",
         pluginId: record.id,
@@ -2228,9 +2265,9 @@ export function createPluginRegistry(registryParams: PluginRegistryParams) {
       pluginId: record.id,
       pluginName: record.name,
       policy: {
-        ...policy,
         id,
         description,
+        evaluate: evaluate as PluginTrustedToolPolicyRegistration["evaluate"],
       },
       source: record.source,
       rootDir: record.rootDir,