fix: improve tool summaries

src/agents/tool-display.test.ts

@@ -0,0 +1,56 @@
+import { describe, expect, it } from "vitest";
+
+import { formatToolDetail, resolveToolDisplay } from "./tool-display.js";
+
+describe("tool display details", () => {
+  it("skips zero/false values for optional detail fields", () => {
+    const detail = formatToolDetail(
+      resolveToolDisplay({
+        name: "sessions_spawn",
+        args: {
+          task: "double-message-bug-gpt",
+          label: 0,
+          runTimeoutSeconds: 0,
+          timeoutSeconds: 0,
+        },
+      }),
+    );
+
+    expect(detail).toBe("double-message-bug-gpt");
+  });
+
+  it("includes only truthy boolean details", () => {
+    const detail = formatToolDetail(
+      resolveToolDisplay({
+        name: "message",
+        args: {
+          action: "react",
+          provider: "discord",
+          to: "chan-1",
+          remove: false,
+        },
+      }),
+    );
+
+    expect(detail).toContain("provider discord");
+    expect(detail).toContain("to chan-1");
+    expect(detail).not.toContain("remove");
+  });
+
+  it("keeps positive numbers and true booleans", () => {
+    const detail = formatToolDetail(
+      resolveToolDisplay({
+        name: "sessions_history",
+        args: {
+          sessionKey: "agent:main:main",
+          limit: 20,
+          includeTools: true,
+        },
+      }),
+    );
+
+    expect(detail).toContain("session agent:main:main");
+    expect(detail).toContain("limit 20");
+    expect(detail).toContain("tools true");
+  });
+});