fix: suppress sessions_send warning leakage coverage (#24740) (thanks @Glucksberg)

CHANGELOG.md

@@ -29,6 +29,7 @@ Docs: https://docs.openclaw.ai
 - Exec/Bash tools: clamp poll sleep duration to non-negative values in process polling loops. (#24889)
 - Subagents/Announce queue: add exponential backoff when queue-drain delivery fails to reduce retry storms. (#24783)
 - Config/Kilo Gateway: Kilo provider flow now surfaces an updated list of models. (#24921) thanks @gumadeiras.
+- Agents/Tool warnings: suppress `sessions_send` relay errors from chat-facing warning payloads to avoid leaking transient inter-session transport failures. (#24740) Thanks @Glucksberg.
 - WhatsApp/Logging: redact outbound recipient identifiers in WhatsApp outbound + heartbeat logs and remove message/poll preview text from those log lines. (#24980) Thanks @coygeek.
 - WhatsApp/Auto-reply: send only final payloads to WhatsApp, suppress tool/block payload leakage (reasoning/thinking), and force block streaming off for WhatsApp dispatch so final-only delivery cannot cause silent turns. (#24962) Thanks @SidQin-cyber.
 - Telegram/Media SSRF: keep RFC2544 benchmark range (`198.18.0.0/15`) blocked by default, add an explicit SSRF-policy opt-in for Telegram media downloads, and keep other channels/URL fetch paths blocked. (#24982) Thanks @stakeswky.

src/agents/pi-embedded-runner/run/payloads.test.ts

@@ -60,4 +60,26 @@ describe("buildEmbeddedRunPayloads tool-error warnings", () => {
       absentDetail,
     });
   });
+
+  it("suppresses sessions_send errors to avoid leaking transient relay failures", () => {
+    const payloads = buildPayloads({
+      lastToolError: { toolName: "sessions_send", error: "delivery timeout" },
+      verboseLevel: "on",
+    });
+
+    expect(payloads).toHaveLength(0);
+  });
+
+  it("suppresses sessions_send errors even when marked mutating", () => {
+    const payloads = buildPayloads({
+      lastToolError: {
+        toolName: "sessions_send",
+        error: "delivery timeout",
+        mutatingAction: true,
+      },
+      verboseLevel: "on",
+    });
+
+    expect(payloads).toHaveLength(0);
+  });
 });