diff --git a/canvas/src/components/WorkspaceNode.tsx b/canvas/src/components/WorkspaceNode.tsx
index ad469de6..9b40be44 100644
--- a/canvas/src/components/WorkspaceNode.tsx
+++ b/canvas/src/components/WorkspaceNode.tsx
@@ -29,9 +29,9 @@ function useHierarchyInfo(parentId: string) {
 }
 
 /** Eject/extract arrow icon — visually distinct from delete ✕ */
-function EjectIcon() {
+function EjectIcon(props: React.SVGProps<SVGSVGElement>) {
   return (
-    <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round">
+    <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" {...props}>
       <path d="M3 7L7 3" />
       <path d="M4 3H7V6" />
     </svg>
@@ -377,14 +377,15 @@ function TeamMemberChip({
               {tierCfg.label}
             </span>
             <button
+              aria-label={`Extract ${data.name} from team`}
+              title={`Extract ${data.name} from team`}
               onClick={(e) => {
                 e.stopPropagation();
                 onExtract(node.id);
               }}
-              title="Extract from team"
               className="opacity-0 group-hover/child:opacity-100 text-zinc-500 hover:text-sky-400 transition-all"
             >
-              <EjectIcon />
+              <EjectIcon aria-hidden="true" />
             </button>
           </div>
         </div>
diff --git a/canvas/src/components/__tests__/WorkspaceNode.eject.test.tsx b/canvas/src/components/__tests__/WorkspaceNode.eject.test.tsx
new file mode 100644
index 00000000..6e8e50ac
--- /dev/null
+++ b/canvas/src/components/__tests__/WorkspaceNode.eject.test.tsx
@@ -0,0 +1,185 @@
+// @vitest-environment jsdom
+/**
+ * Tests for issue #854 — TeamMemberChip eject button:
+ *   - aria-label must be dynamic: `Extract ${childName} from team`
+ *   - title must be dynamic: `Extract ${childName} from team`
+ *   - EjectIcon svg must carry aria-hidden="true"
+ */
+import { describe, it, expect, vi, afterEach } from "vitest";
+import { render, cleanup } from "@testing-library/react";
+import type { Node } from "@xyflow/react";
+import type { WorkspaceNodeData } from "@/store/canvas";
+
+afterEach(() => {
+  cleanup();
+  vi.restoreAllMocks();
+});
+
+// ── Mock @xyflow/react ─────────────────────────────────────────────────────────
+vi.mock("@xyflow/react", () => ({
+  Handle: () => null,
+  Position: { Bottom: "bottom", Top: "top" },
+  useReactFlow: vi.fn(),
+}));
+
+// ── Mock Toaster ───────────────────────────────────────────────────────────────
+vi.mock("@/components/Toaster", () => ({ showToast: vi.fn() }));
+
+// ── Mock Tooltip ───────────────────────────────────────────────────────────────
+vi.mock("@/components/Tooltip", () => ({
+  Tooltip: ({ children }: { children: React.ReactNode }) => <>{children}</>,
+}));
+
+// ── Mock design tokens ─────────────────────────────────────────────────────────
+vi.mock("@/lib/design-tokens", () => ({
+  STATUS_CONFIG: {
+    online: { label: "Online", dot: "bg-emerald-400", bar: "from-emerald-500/10" },
+    offline: { label: "Offline", dot: "bg-zinc-600", bar: "from-zinc-700/10" },
+    provisioning: { label: "Provisioning", dot: "bg-sky-400", bar: "from-sky-500/10" },
+    degraded: { label: "Degraded", dot: "bg-amber-400", bar: "from-amber-500/10" },
+    failed: { label: "Failed", dot: "bg-red-400", bar: "from-red-500/10" },
+    paused: { label: "Paused", dot: "bg-zinc-500", bar: "from-zinc-600/10" },
+  },
+  TIER_CONFIG: {
+    1: { label: "T1", color: "text-zinc-400 bg-zinc-800" },
+    2: { label: "T2", color: "text-blue-400 bg-blue-900/40" },
+  },
+}));
+
+// ── Canvas store mock state ────────────────────────────────────────────────────
+const PARENT_ID = "parent-ws";
+const CHILD_ID = "child-ws";
+const CHILD_NAME = "Child Workspace";
+
+function makeNodeData(overrides: Partial<WorkspaceNodeData> = {}): WorkspaceNodeData {
+  return {
+    name: "Test WS",
+    role: "agent",
+    tier: 1,
+    status: "online",
+    agentCard: null,
+    url: "http://localhost:9000",
+    parentId: null,
+    activeTasks: 0,
+    lastErrorRate: 0,
+    lastSampleError: "",
+    uptimeSeconds: 60,
+    currentTask: "",
+    collapsed: false,
+    runtime: "",
+    needsRestart: false,
+    budgetLimit: null,
+    ...overrides,
+  };
+}
+
+const parentNodeData = makeNodeData({ name: "Parent WS", parentId: null });
+const childNodeData = makeNodeData({ name: CHILD_NAME, parentId: PARENT_ID });
+
+const allNodes: Node<WorkspaceNodeData>[] = [
+  { id: PARENT_ID, type: "workspaceNode", position: { x: 0, y: 0 }, data: parentNodeData },
+  { id: CHILD_ID, type: "workspaceNode", position: { x: 0, y: 0 }, data: childNodeData, hidden: true },
+];
+
+// Build a selector-compatible mock of useCanvasStore
+const mockStoreState = {
+  nodes: allNodes,
+  edges: [],
+  selectedNodeId: null,
+  panelTab: "chat",
+  dragOverNodeId: null,
+  contextMenu: null,
+  searchOpen: false,
+  viewport: { x: 0, y: 0, zoom: 1 },
+  selectNode: vi.fn(),
+  openContextMenu: vi.fn(),
+  nestNode: vi.fn(),
+  isDescendant: vi.fn(() => false),
+  restartWorkspace: vi.fn(),
+  setPanelTab: vi.fn(),
+};
+
+vi.mock("@/store/canvas", () => ({
+  useCanvasStore: Object.assign(
+    vi.fn((selector: (s: typeof mockStoreState) => unknown) =>
+      selector(mockStoreState)
+    ),
+    { getState: () => mockStoreState }
+  ),
+}));
+
+// ── Mock zustand/react/shallow ─────────────────────────────────────────────────
+vi.mock("zustand/react/shallow", () => ({
+  useShallow: (fn: (s: typeof mockStoreState) => unknown) => fn,
+}));
+
+// ── Import component AFTER mocks ───────────────────────────────────────────────
+import { WorkspaceNode } from "../WorkspaceNode";
+
+// ── Helpers ────────────────────────────────────────────────────────────────────
+function renderParentNode() {
+  return render(
+    <WorkspaceNode
+      id={PARENT_ID}
+      data={parentNodeData}
+      // NodeProps required but unused in our mock env
+      type="workspaceNode"
+      selected={false}
+      isConnectable={true}
+      zIndex={0}
+      positionAbsoluteX={0}
+      positionAbsoluteY={0}
+      dragging={false}
+    />
+  );
+}
+
+// ── Tests ──────────────────────────────────────────────────────────────────────
+
+describe("TeamMemberChip eject button — aria-label (issue #854)", () => {
+  it("eject button has a dynamic aria-label containing the child workspace name", () => {
+    const { container } = renderParentNode();
+    const buttons = container.querySelectorAll("button");
+    const ejectBtn = Array.from(buttons).find(
+      (b) => b.getAttribute("aria-label")?.includes("Extract") && b.getAttribute("aria-label")?.includes("from team")
+    );
+    expect(ejectBtn).toBeTruthy();
+    expect(ejectBtn?.getAttribute("aria-label")).toBe(`Extract ${CHILD_NAME} from team`);
+  });
+});
+
+describe("TeamMemberChip eject button — title tooltip (issue #854)", () => {
+  it("eject button has a dynamic title tooltip containing the child workspace name", () => {
+    const { container } = renderParentNode();
+    const buttons = container.querySelectorAll("button");
+    const ejectBtn = Array.from(buttons).find(
+      (b) => b.getAttribute("title")?.includes("Extract") && b.getAttribute("title")?.includes("from team")
+    );
+    expect(ejectBtn).toBeTruthy();
+    expect(ejectBtn?.getAttribute("title")).toBe(`Extract ${CHILD_NAME} from team`);
+  });
+
+  it("aria-label and title are identical (both use child workspace name)", () => {
+    const { container } = renderParentNode();
+    const buttons = container.querySelectorAll("button");
+    const ejectBtn = Array.from(buttons).find(
+      (b) => b.getAttribute("aria-label")?.startsWith("Extract")
+    );
+    expect(ejectBtn).toBeTruthy();
+    expect(ejectBtn?.getAttribute("aria-label")).toBe(ejectBtn?.getAttribute("title"));
+  });
+});
+
+describe("TeamMemberChip eject button — aria-hidden on EjectIcon (issue #854)", () => {
+  it("EjectIcon svg has aria-hidden='true' to prevent AT double-announcement", () => {
+    const { container } = renderParentNode();
+    const buttons = container.querySelectorAll("button");
+    const ejectBtn = Array.from(buttons).find(
+      (b) => b.getAttribute("aria-label")?.startsWith("Extract")
+    );
+    expect(ejectBtn).toBeTruthy();
+    const svg = ejectBtn?.querySelector("svg");
+    expect(svg).toBeTruthy();
+    expect(svg?.getAttribute("aria-hidden")).toBe("true");
+  });
+});