diff --git a/src/components/chat/AgentPermissionRequests.tsx b/src/components/chat/AgentPermissionRequests.tsx
index 4409935..7c94387 100644
--- a/src/components/chat/AgentPermissionRequests.tsx
+++ b/src/components/chat/AgentPermissionRequests.tsx
@@ -27,32 +27,6 @@ import VerifiedUserRounded from "@mui/icons-material/VerifiedUserRounded";
 import type { PermissionReply } from "@/lib/chatStream";
 import type { Message } from "./GlobalChatbox.types";
 
-const formatMetadataValue = (value: unknown) => {
-  if (typeof value === "string") {
-    return value;
-  }
-  try {
-    return JSON.stringify(value);
-  } catch {
-    return "[unserializable]";
-  }
-};
-
-const truncateText = (value: string, maxLength: number) =>
-  value.length > maxLength ? `${value.slice(0, maxLength - 3)}...` : value;
-
-const formatMetadata = (metadata: Record<string, unknown>) => {
-  const entries = Object.entries(metadata)
-    .filter(([key]) => !["command", "path", "file", "directory"].includes(key))
-    .slice(0, 3);
-  if (!entries.length) {
-    return "";
-  }
-  return entries
-    .map(([key, value]) => `${key}: ${truncateText(formatMetadataValue(value), 64)}`)
-    .join("；");
-};
-
 const getPermissionTitle = (permission: NonNullable<Message["permissions"]>[number]) => {
   if (permission.permission === "external_directory") return "访问工作区外目录";
   if (permission.permission === "bash") return "执行终端命令";
@@ -63,15 +37,8 @@ const getPermissionTitle = (permission: NonNullable<Message["permissions"]>[numb
 const getPermissionPrimaryValue = (
   permission: NonNullable<Message["permissions"]>[number],
 ) => {
-  const command = permission.metadata.command;
-  if (typeof command === "string" && command.trim()) {
-    return command.trim();
-  }
-  for (const key of ["path", "file", "directory"]) {
-    const value = permission.metadata[key];
-    if (typeof value === "string" && value.trim()) {
-      return value.trim();
-    }
+  if (typeof permission.target === "string" && permission.target.trim()) {
+    return permission.target.trim();
   }
   return permission.patterns[0] ?? permission.permission;
 };
@@ -139,7 +106,6 @@ const PermissionRequestCard = ({
     isRunning && (permission.status === "pending" || permission.status === "error");
   const isSubmitting = isRunning && permission.status === "submitting";
   const primaryValue = getPermissionPrimaryValue(permission);
-  const metadataText = formatMetadata(permission.metadata);
   const accentColor = getPermissionStatusColor(permission.status, theme);
   const statusTextColor = getPermissionStatusTextColor(permission.status, theme);
   const statusLabel = getPermissionStatusLabel(permission.status);
@@ -237,12 +203,6 @@ const PermissionRequestCard = ({
             {primaryValue}
           </Typography>
         </Box>
-
-        {metadataText ? (
-          <Typography variant="caption" color="text.secondary" sx={{ wordBreak: "break-word" }}>
-            {metadataText}
-          </Typography>
-        ) : null}
       </Stack>
 
       {permission.error ? (
diff --git a/src/components/chat/GlobalChatbox.types.ts b/src/components/chat/GlobalChatbox.types.ts
index 8877e6b..95df637 100644
--- a/src/components/chat/GlobalChatbox.types.ts
+++ b/src/components/chat/GlobalChatbox.types.ts
@@ -41,7 +41,7 @@ export type AgentPermissionRequest = {
   sessionId: string;
   permission: string;
   patterns: string[];
-  metadata: Record<string, unknown>;
+  target?: string;
   always: string[];
   tool?: {
     messageID: string;
diff --git a/src/components/chat/GlobalChatbox.utils.ts b/src/components/chat/GlobalChatbox.utils.ts
index 44ad9b6..f343664 100644
--- a/src/components/chat/GlobalChatbox.utils.ts
+++ b/src/components/chat/GlobalChatbox.utils.ts
@@ -88,7 +88,6 @@ export const cloneMessage = (message: Message): Message => ({
           ? [...permission.patterns]
           : [],
         always: Array.isArray(permission.always) ? [...permission.always] : [],
-        metadata: permission.metadata ?? {},
       }))
     : undefined,
   questions: normalizeQuestionRequests(message.questions),
diff --git a/src/components/chat/hooks/agentChatSessionState.ts b/src/components/chat/hooks/agentChatSessionState.ts
index 203bb62..2961f9e 100644
--- a/src/components/chat/hooks/agentChatSessionState.ts
+++ b/src/components/chat/hooks/agentChatSessionState.ts
@@ -115,7 +115,7 @@ export const upsertPermission = (
     sessionId: event.sessionId,
     permission: event.permission,
     patterns: event.patterns,
-    metadata: event.metadata,
+    target: event.target,
     always: event.always,
     tool: event.tool,
     createdAt: event.createdAt,
diff --git a/src/components/chat/hooks/useAgentChatSession.actions.test.tsx b/src/components/chat/hooks/useAgentChatSession.actions.test.tsx
index 8149ea2..5b7e868 100644
--- a/src/components/chat/hooks/useAgentChatSession.actions.test.tsx
+++ b/src/components/chat/hooks/useAgentChatSession.actions.test.tsx
@@ -99,7 +99,7 @@ describe("useAgentChatSession actions", () => {
         requestId: "perm-1",
         permission: "bash",
         patterns: ["rm *"],
-        metadata: { command: "rm tmp.txt" },
+        target: "rm tmp.txt",
         always: ["rm *"],
         createdAt: 123,
       });
@@ -163,7 +163,7 @@ describe("useAgentChatSession actions", () => {
             requestId: "perm-abort",
             permission: "bash",
             patterns: ["npm test"],
-            metadata: { command: "npm test" },
+            target: "npm test",
             always: ["npm test"],
             createdAt: 1002,
           } satisfies StreamEvent);
diff --git a/src/lib/chatStream.test.ts b/src/lib/chatStream.test.ts
index 77c4593..339eaa9 100644
--- a/src/lib/chatStream.test.ts
+++ b/src/lib/chatStream.test.ts
@@ -186,7 +186,7 @@ describe("streamAgentChat", () => {
     apiFetch.mockResolvedValue({
       ok: true,
       body: makeStream([
-        'event: permission_request\ndata: {"session_id":"s1","request_id":"perm-1","permission":"bash","patterns":["rm *"],"metadata":{"command":"rm tmp.txt"},"always":["rm *"],"created_at":123}\n\n',
+        'event: permission_request\ndata: {"session_id":"s1","request_id":"perm-1","permission":"bash","patterns":["rm *"],"target":"rm tmp.txt","always":["rm *"],"created_at":123}\n\n',
         'event: permission_response\ndata: {"session_id":"s1","request_id":"perm-1","reply":"reject"}\n\n',
       ]),
     });
@@ -205,7 +205,7 @@ describe("streamAgentChat", () => {
         requestId: "perm-1",
         permission: "bash",
         patterns: ["rm *"],
-        metadata: { command: "rm tmp.txt" },
+        target: "rm tmp.txt",
         always: ["rm *"],
         tool: undefined,
         createdAt: 123,
diff --git a/src/lib/chatStream.ts b/src/lib/chatStream.ts
index 84886a7..f1fc494 100644
--- a/src/lib/chatStream.ts
+++ b/src/lib/chatStream.ts
@@ -98,7 +98,7 @@ export type StreamEvent =
       requestId: string;
       permission: string;
       patterns: string[];
-      metadata: Record<string, unknown>;
+      target?: string;
       always: string[];
       tool?: {
         messageID: string;
@@ -296,7 +296,7 @@ const emitParsedStreamEvent = (
       request_id?: string;
       permission?: string;
       patterns?: unknown;
-      metadata?: unknown;
+      target?: string;
       always?: unknown;
       created_at?: number;
       reply?: PermissionReply;
@@ -370,7 +370,7 @@ const emitParsedStreamEvent = (
         patterns: Array.isArray(parsed.patterns)
           ? parsed.patterns.filter((item): item is string => typeof item === "string")
           : [],
-        metadata: isObjectRecord(parsed.metadata) ? parsed.metadata : {},
+        target: typeof parsed.target === "string" ? parsed.target : undefined,
         always: Array.isArray(parsed.always)
           ? parsed.always.filter((item): item is string => typeof item === "string")
           : [],