diff --git a/mateclaw-server/src/main/java/vip/mate/approval/grant/controller/ApprovalGrantController.java b/mateclaw-server/src/main/java/vip/mate/approval/grant/controller/ApprovalGrantController.java
index 6074c80b..42ded287 100644
--- a/mateclaw-server/src/main/java/vip/mate/approval/grant/controller/ApprovalGrantController.java
+++ b/mateclaw-server/src/main/java/vip/mate/approval/grant/controller/ApprovalGrantController.java
@@ -11,6 +11,7 @@ import org.springframework.security.core.Authentication;
 import org.springframework.web.bind.annotation.*;
 import vip.mate.approval.grant.entity.ApprovalGrant;
 import vip.mate.approval.grant.entity.ApprovalResolutionLog;
+import vip.mate.agent.repository.AgentMapper;
 import vip.mate.approval.grant.repository.ApprovalGrantMapper;
 import vip.mate.approval.grant.repository.ApprovalResolutionLogMapper;
 import vip.mate.approval.grant.service.ApprovalGrantService;
@@ -55,6 +56,7 @@ public class ApprovalGrantController {
     private static final long DEFAULT_WORKSPACE_ID = 1L;
 
     private final ApprovalGrantService grantService;
+    private final AgentMapper agentMapper;
     private final ApprovalGrantMapper grantMapper;
     private final ApprovalResolutionLogMapper resolutionMapper;
     private final AuthService authService;
@@ -295,6 +297,7 @@ public class ApprovalGrantController {
                 }
             }
             case ApprovalGrant.ScopeType.AGENT -> {
+                requireExistingAgent(body.scopeId);
                 if (toolNull) {
                     requireAdminPlusPassword(isAdmin, body.password, actorId);
                 } else if (!isAdmin) {
@@ -304,6 +307,15 @@ public class ApprovalGrantController {
                 }
             }
             case ApprovalGrant.ScopeType.WORKSPACE -> {
+                // WORKSPACE-scope matching requires scope_id == the invocation's
+                // workspaceId AND the grant row's workspace_id (tenant column) to
+                // equal that same workspace — a scopeId pointing anywhere else can
+                // never fire. Reject the dead configuration outright.
+                if (!String.valueOf(workspaceId).equals(body.scopeId)) {
+                    throw new MateClawException("err.approval.workspace_scope_mismatch", 400,
+                            "WORKSPACE-scope scopeId must equal the current workspace id ("
+                                    + workspaceId + "); a cross-workspace grant can never match");
+                }
                 workspaceService.requirePermission(workspaceId, actorId, "admin");
                 if (toolNull) {
                     requireAdminPlusPassword(true, body.password, actorId);
@@ -314,6 +326,24 @@ public class ApprovalGrantController {
         }
     }
 
+    /**
+     * AGENT-scope scopeId must reference an existing agent — a workspace or
+     * conversation id pasted here compiles into a grant that never matches.
+     */
+    private void requireExistingAgent(String scopeId) {
+        Long agentId;
+        try {
+            agentId = Long.parseLong(scopeId);
+        } catch (NumberFormatException e) {
+            throw new MateClawException("err.approval.agent_not_found", 400,
+                    "AGENT-scope scopeId must be a numeric agent id: " + scopeId);
+        }
+        if (agentMapper.selectById(agentId) == null) {
+            throw new MateClawException("err.approval.agent_not_found", 400,
+                    "AGENT-scope scopeId does not reference an existing agent: " + scopeId);
+        }
+    }
+
     private void requireAdminPlusPassword(boolean isAdmin, String rawPassword, Long actorId) {
         if (!isAdmin) {
             throw new MateClawException("err.approval.admin_required", 403, "admin role required");
diff --git a/mateclaw-server/src/test/java/vip/mate/approval/grant/controller/ApprovalGrantControllerTest.java b/mateclaw-server/src/test/java/vip/mate/approval/grant/controller/ApprovalGrantControllerTest.java
index 1085efab..fcf3f03b 100644
--- a/mateclaw-server/src/test/java/vip/mate/approval/grant/controller/ApprovalGrantControllerTest.java
+++ b/mateclaw-server/src/test/java/vip/mate/approval/grant/controller/ApprovalGrantControllerTest.java
@@ -10,6 +10,8 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.Authentication;
+import vip.mate.agent.model.AgentEntity;
+import vip.mate.agent.repository.AgentMapper;
 import vip.mate.approval.grant.entity.ApprovalGrant;
 import vip.mate.approval.grant.repository.ApprovalGrantMapper;
 import vip.mate.approval.grant.repository.ApprovalResolutionLogMapper;
@@ -51,8 +53,10 @@ class ApprovalGrantControllerTest {
     private static final long WORKSPACE_ID = 100L;
     private static final long MEMBER_ID = 1001L;
     private static final long ADMIN_ID = 2002L;
+    private static final long AGENT_ID = 3003L;
 
     @Mock ApprovalGrantService grantService;
+    @Mock AgentMapper agentMapper;
     @Mock ApprovalGrantMapper grantMapper;
     @Mock ApprovalResolutionLogMapper resolutionMapper;
     @Mock AuthService authService;
@@ -79,6 +83,12 @@ class ApprovalGrantControllerTest {
         // flag the unused one. Using lenient here keeps setUp shared.
         lenient().when(authService.findByUsername("member-user")).thenReturn(member);
         lenient().when(authService.findByUsername("admin-user")).thenReturn(admin);
+
+        // AGENT-scope creation now verifies the target agent exists; most tests
+        // use AGENT_ID as a valid reference. Lenient: non-AGENT tests never hit it.
+        AgentEntity agent = new AgentEntity();
+        agent.setId(AGENT_ID);
+        lenient().when(agentMapper.selectById(AGENT_ID)).thenReturn(agent);
     }
 
     @Nested
@@ -118,7 +128,7 @@ class ApprovalGrantControllerTest {
 
         @Test
         void agent_scope_explicit_tool_requires_admin() {
-            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "agent-1", "read_file");
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", String.valueOf(AGENT_ID), "read_file");
             doThrow(new MateClawException("err.workspace.insufficient_permission", 403, "admin required"))
                     .when(workspaceService).requirePermission(WORKSPACE_ID, MEMBER_ID, "admin");
 
@@ -128,7 +138,7 @@ class ApprovalGrantControllerTest {
 
         @Test
         void agent_scope_null_tool_requires_admin_plus_password() {
-            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "agent-1", null);
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", String.valueOf(AGENT_ID), null);
             // admin true; missing password → 403
             when(workspaceService.hasPermission(WORKSPACE_ID, ADMIN_ID, "admin")).thenReturn(true);
             body.password = null;
@@ -140,7 +150,7 @@ class ApprovalGrantControllerTest {
 
         @Test
         void agent_scope_null_tool_admin_with_password_passes() {
-            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "agent-1", null);
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", String.valueOf(AGENT_ID), null);
             body.password = "correct-password";
             when(workspaceService.hasPermission(WORKSPACE_ID, ADMIN_ID, "admin")).thenReturn(true);
             // verifyCurrentUserPassword passes silently when correct.
@@ -186,9 +196,45 @@ class ApprovalGrantControllerTest {
                     .hasMessageContaining("CRITICAL is not auto-approvable");
         }
 
+        @Test
+        void workspace_scope_id_must_match_current_workspace() {
+            // A WORKSPACE-scope grant whose scopeId is a different workspace can
+            // never match at runtime (tenant column + scope match both fail) —
+            // rejected at creation as a dead configuration.
+            ApprovalGrantController.CreateGrantRequest body = baseBody("WORKSPACE",
+                    "2079860736482390017", "read_file");
+
+            assertThatThrownBy(() -> controller.create(body, WORKSPACE_ID, adminAuth))
+                    .isInstanceOf(MateClawException.class)
+                    .hasMessageContaining("must equal the current workspace id");
+            verify(grantMapper, never()).insert(any(ApprovalGrant.class));
+        }
+
+        @Test
+        void agent_scope_nonexistent_agent_is_rejected() {
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "424242", "read_file");
+            when(agentMapper.selectById(424242L)).thenReturn(null);
+
+            assertThatThrownBy(() -> controller.create(body, WORKSPACE_ID, adminAuth))
+                    .isInstanceOf(MateClawException.class)
+                    .hasMessageContaining("does not reference an existing agent");
+            verify(grantMapper, never()).insert(any(ApprovalGrant.class));
+        }
+
+        @Test
+        void agent_scope_non_numeric_id_is_rejected() {
+            // e.g. a conversation id or workspace name pasted into the AGENT scope.
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "wecom:xxx", "read_file");
+
+            assertThatThrownBy(() -> controller.create(body, WORKSPACE_ID, adminAuth))
+                    .isInstanceOf(MateClawException.class)
+                    .hasMessageContaining("must be a numeric agent id");
+            verify(grantMapper, never()).insert(any(ApprovalGrant.class));
+        }
+
         @Test
         void until_conversation_end_requires_conversation_scope() {
-            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", "agent-1", "read_file");
+            ApprovalGrantController.CreateGrantRequest body = baseBody("AGENT", String.valueOf(AGENT_ID), "read_file");
             body.grantKind = "UNTIL_CONVERSATION_END";
 
             assertThatThrownBy(() -> controller.create(body, WORKSPACE_ID, memberAuth))
diff --git a/mateclaw-ui/src/i18n/locales/en-US.ts b/mateclaw-ui/src/i18n/locales/en-US.ts
index a10dd973..81241841 100644
--- a/mateclaw-ui/src/i18n/locales/en-US.ts
+++ b/mateclaw-ui/src/i18n/locales/en-US.ts
@@ -4424,7 +4424,7 @@ export default {
         severityMedium: 'auto-approve LOW/MEDIUM findings',
         severityHigh: 'auto-approve LOW/MEDIUM/HIGH findings',
         scopeIdPickAgent: 'Pick an agent…',
-        scopeIdWorkspaceHint: 'Pick the workspace this grant applies to (must be the workspace the conversation actually belongs to).',
+        scopeIdWorkspaceHint: 'Fixed to the current workspace. To create a grant for another workspace, switch workspaces in the console first.',
         scopeIdAgentHint: 'Applies to every conversation of the selected agent within this workspace.',
         scopeIdUserHint: 'USER-scope grants can only target the currently logged-in user.',
         scopeIdConversationHint: 'Conversation id, as shown in the audit log "session" column (e.g. wecom:xxx).',
diff --git a/mateclaw-ui/src/i18n/locales/zh-CN.ts b/mateclaw-ui/src/i18n/locales/zh-CN.ts
index 0a01d598..91a6aa31 100644
--- a/mateclaw-ui/src/i18n/locales/zh-CN.ts
+++ b/mateclaw-ui/src/i18n/locales/zh-CN.ts
@@ -4516,7 +4516,7 @@ export default {
         severityMedium: '放行低/中危命中',
         severityHigh: '放行低/中/高危命中',
         scopeIdPickAgent: '选择智能体…',
-        scopeIdWorkspaceHint: '选择策略生效的工作区（必须与会话实际所属工作区一致）。',
+        scopeIdWorkspaceHint: '固定为当前工作区。如需为其他工作区创建策略，请先在控制台切换工作区。',
         scopeIdAgentHint: '选择智能体后，该智能体在本工作区的所有会话均适用。',
         scopeIdUserHint: '只能为当前登录用户创建 USER 范围策略。',
         scopeIdConversationHint: '填写会话 ID，可在审计日志的"会话"列查看（如 wecom:xxx）。',
diff --git a/mateclaw-ui/src/views/Security/AutoApproveGrants/index.vue b/mateclaw-ui/src/views/Security/AutoApproveGrants/index.vue
index c895123d..ca48f12f 100644
--- a/mateclaw-ui/src/views/Security/AutoApproveGrants/index.vue
+++ b/mateclaw-ui/src/views/Security/AutoApproveGrants/index.vue
@@ -207,20 +207,16 @@
                 <label>{{ t('approval.grant.form.scopeId') }} <span class="required">*</span></label>
                 <!-- Scope-typed pickers: free-text snowflake input made it far too
                      easy to paste the wrong kind of id (e.g. a workspace id into an
-                     AGENT-scope grant), producing a grant that never matches. -->
-                <select
+                     AGENT-scope grant), producing a grant that never matches.
+                     WORKSPACE is locked to the current workspace — the backend
+                     rejects any other id as a dead configuration. -->
+                <input
                   v-if="form.scopeType === 'WORKSPACE'"
-                  v-model="form.scopeId"
+                  :value="currentWorkspaceLabel"
+                  type="text"
                   class="form-input"
-                >
-                  <option
-                    v-for="ws in workspaceStore.workspaces"
-                    :key="String(ws.id)"
-                    :value="String(ws.id)"
-                  >
-                    {{ ws.name }} (#{{ ws.id }})
-                  </option>
-                </select>
+                  disabled
+                />
                 <select
                   v-else-if="form.scopeType === 'AGENT'"
                   v-model="form.scopeId"