diff --git a/src/agents/openclaw-tools.sessions.test.ts b/src/agents/openclaw-tools.sessions.test.ts
index d301893067b..4957a657d98 100644
--- a/src/agents/openclaw-tools.sessions.test.ts
+++ b/src/agents/openclaw-tools.sessions.test.ts
@@ -167,6 +167,13 @@ describe("sessions tools", () => {
               updatedAt: 12,
               parentSessionKey: "agent:main:main",
             },
+            {
+              key: "agent:main:subagent:worker",
+              kind: "direct",
+              sessionId: "s-subagent-worker",
+              updatedAt: 13,
+              spawnedBy: "agent:main:main",
+            },
             {
               key: "cron:job-1",
               kind: "direct",
@@ -203,6 +210,7 @@ describe("sessions tools", () => {
       sessions?: Array<{
         key?: string;
         channel?: string;
+        spawnedBy?: string;
         status?: string;
         startedAt?: number;
         runtimeMs?: number;
@@ -212,7 +220,7 @@ describe("sessions tools", () => {
         messages?: Array<{ role?: string }>;
       }>;
     };
-    expect(details.sessions).toHaveLength(4);
+    expect(details.sessions).toHaveLength(5);
     const main = details.sessions?.find((s) => s.key === "main");
     expect(main?.channel).toBe("whatsapp");
     expect(main?.messages?.length).toBe(1);
@@ -228,6 +236,9 @@ describe("sessions tools", () => {
     const dashboardChild = details.sessions?.find((s) => s.key === "agent:main:dashboard:child");
     expect(dashboardChild?.parentSessionKey).toBe("agent:main:main");
 
+    const subagentWorker = details.sessions?.find((s) => s.key === "agent:main:subagent:worker");
+    expect(subagentWorker?.spawnedBy).toBe("agent:main:main");
+
     const cronOnly = await tool.execute("call2", { kinds: ["cron"] });
     const cronDetails = cronOnly.details as {
       sessions?: Array<Record<string, unknown>>;
diff --git a/src/agents/tools/sessions-helpers.ts b/src/agents/tools/sessions-helpers.ts
index 4ea24d00b7b..63c87e16884 100644
--- a/src/agents/tools/sessions-helpers.ts
+++ b/src/agents/tools/sessions-helpers.ts
@@ -52,6 +52,7 @@ export type SessionListRow = {
   key: string;
   kind: SessionKind;
   channel: string;
+  spawnedBy?: string;
   label?: string;
   displayName?: string;
   parentSessionKey?: string;
diff --git a/src/agents/tools/sessions-list-tool.ts b/src/agents/tools/sessions-list-tool.ts
index 32a09c2bd5b..cea07e09f1e 100644
--- a/src/agents/tools/sessions-list-tool.ts
+++ b/src/agents/tools/sessions-list-tool.ts
@@ -193,6 +193,14 @@ export function createSessionsListTool(opts?: {
           key: displayKey,
           kind,
           channel: derivedChannel,
+          spawnedBy:
+            typeof entry.spawnedBy === "string"
+              ? resolveDisplaySessionKey({
+                  key: entry.spawnedBy,
+                  alias,
+                  mainKey,
+                })
+              : undefined,
           label: typeof entry.label === "string" ? entry.label : undefined,
           displayName: typeof entry.displayName === "string" ? entry.displayName : undefined,
           parentSessionKey: