diff --git a/packages/shared/src/types/issue.ts b/packages/shared/src/types/issue.ts
index 0dc0bc030a..da94fbdd15 100644
--- a/packages/shared/src/types/issue.ts
+++ b/packages/shared/src/types/issue.ts
@@ -793,6 +793,7 @@ export interface Issue {
   ancestors?: IssueAncestor[];
   title: string;
   description: string | null;
+  descriptionTruncated?: boolean;
   status: IssueStatus;
   workMode: IssueWorkMode;
   priority: IssuePriority;
diff --git a/server/src/__tests__/issues-service.test.ts b/server/src/__tests__/issues-service.test.ts
index 825e0048fd..ee0632e673 100644
--- a/server/src/__tests__/issues-service.test.ts
+++ b/server/src/__tests__/issues-service.test.ts
@@ -2590,11 +2590,65 @@ describeEmbeddedPostgres("issueService.list participantAgentId", () => {
 
     expect(result).toBeTruthy();
     expect(result?.description).toHaveLength(1200);
+    expect(result?.descriptionTruncated).toBe(true);
     expect(result?.executionPolicy).toBeNull();
     expect(result?.executionState).toBeNull();
     expect(result?.executionWorkspaceSettings).toBeNull();
   });
 
+  it("marks list descriptions as not truncated when they fit the preview limit", async () => {
+    const companyId = randomUUID();
+    const issueId = randomUUID();
+    const description = "x".repeat(1200);
+
+    await db.insert(companies).values({
+      id: companyId,
+      name: "Paperclip",
+      issuePrefix: `T${companyId.replace(/-/g, "").slice(0, 6).toUpperCase()}`,
+      requireBoardApprovalForNewAgents: false,
+    });
+
+    await db.insert(issues).values({
+      id: issueId,
+      companyId,
+      title: "Exact preview issue",
+      description,
+      status: "todo",
+      priority: "medium",
+    });
+
+    const [result] = await svc.list(companyId);
+
+    expect(result?.description).toHaveLength(1200);
+    expect(result?.descriptionTruncated).toBe(false);
+  });
+
+  it("marks null list descriptions as not truncated", async () => {
+    const companyId = randomUUID();
+    const issueId = randomUUID();
+
+    await db.insert(companies).values({
+      id: companyId,
+      name: "Paperclip",
+      issuePrefix: `T${companyId.replace(/-/g, "").slice(0, 6).toUpperCase()}`,
+      requireBoardApprovalForNewAgents: false,
+    });
+
+    await db.insert(issues).values({
+      id: issueId,
+      companyId,
+      title: "Null description issue",
+      description: null,
+      status: "todo",
+      priority: "medium",
+    });
+
+    const [result] = await svc.list(companyId);
+
+    expect(result?.description).toBeNull();
+    expect(result?.descriptionTruncated).toBe(false);
+  });
+
   it("does not let description preview truncation split multibyte characters", async () => {
     const companyId = randomUUID();
     const issueId = randomUUID();
@@ -2620,6 +2674,7 @@ describeEmbeddedPostgres("issueService.list participantAgentId", () => {
 
     expect(result?.description).toHaveLength(1200);
     expect(result?.description?.endsWith("—")).toBe(true);
+    expect(result?.descriptionTruncated).toBe(true);
   });
 });
 
diff --git a/server/src/services/issues.ts b/server/src/services/issues.ts
index e7500973b0..93a57137dc 100644
--- a/server/src/services/issues.ts
+++ b/server/src/services/issues.ts
@@ -3145,6 +3145,12 @@ const issueListSelect = {
       )
     END
   `,
+  descriptionTruncated: sql<boolean>`
+    CASE
+      WHEN ${issues.description} IS NULL THEN false
+      ELSE length(${issues.description}) > ${ISSUE_LIST_DESCRIPTION_MAX_CHARS}
+    END
+  `,
   status: issues.status,
   workMode: issues.workMode,
   harnessKind: issues.harnessKind,