diff --git a/packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx b/packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx
index 6e0bb87136..d1e855b5c3 100644
--- a/packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx
+++ b/packages/cli/src/ui/components/ToolConfirmationQueue.test.tsx
@@ -7,7 +7,7 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { Box } from 'ink';
 import { ToolConfirmationQueue } from './ToolConfirmationQueue.js';
-import { StreamingState } from '../types.js';
+import { StreamingState, ToolCallStatus } from '../types.js';
 import { renderWithProviders } from '../../test-utils/render.js';
 import { waitFor } from '../../test-utils/async.js';
 import { type Config, CoreToolCallStatus } from '@google/gemini-cli-core';
@@ -223,6 +223,58 @@ describe('ToolConfirmationQueue', () => {
     expect(lastFrame()).toMatchSnapshot();
   });
 
+  it('provides more height for ask_user by subtracting less overhead', async () => {
+    const confirmingTool = {
+      tool: {
+        callId: 'call-1',
+        name: 'ask_user',
+        description: 'ask user',
+        status: ToolCallStatus.Confirming,
+        confirmationDetails: {
+          type: 'ask_user' as const,
+          questions: [
+            {
+              type: 'choice',
+              header: 'Height Test',
+              question: 'Line 1\nLine 2\nLine 3\nLine 4\nLine 5\nLine 6',
+              options: [{ label: 'Option 1', description: 'Desc' }],
+            },
+          ],
+        },
+      },
+      index: 1,
+      total: 1,
+    };
+
+    const { lastFrame } = renderWithProviders(
+      <ToolConfirmationQueue
+        confirmingTool={confirmingTool as unknown as ConfirmingToolState}
+      />,
+      {
+        config: mockConfig,
+        uiState: {
+          terminalWidth: 80,
+          terminalHeight: 40,
+          availableTerminalHeight: 20,
+          constrainHeight: true,
+          streamingState: StreamingState.WaitingForConfirmation,
+        },
+      },
+    );
+
+    // Calculation:
+    // availableTerminalHeight: 20 -> maxHeight: 19 (20-1)
+    // hideToolIdentity is true for ask_user -> subtracts 4 instead of 6
+    // availableContentHeight = 19 - 4 = 15
+    // ToolConfirmationMessage handlesOwnUI=true -> returns full 15
+    // AskUserDialog uses 15 lines to render its multi-line question and options.
+    await waitFor(() => {
+      expect(lastFrame()).toContain('Line 6');
+      expect(lastFrame()).not.toContain('lines hidden');
+    });
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
   it('does not render expansion hint when constrainHeight is false', () => {
     const longDiff = 'line\n'.repeat(50);
     const confirmingTool = {
diff --git a/packages/cli/src/ui/components/ToolConfirmationQueue.tsx b/packages/cli/src/ui/components/ToolConfirmationQueue.tsx
index 52cba7e0d7..e3c18e0231 100644
--- a/packages/cli/src/ui/components/ToolConfirmationQueue.tsx
+++ b/packages/cli/src/ui/components/ToolConfirmationQueue.tsx
@@ -60,6 +60,12 @@ export const ToolConfirmationQueue: React.FC<ToolConfirmationQueueProps> = ({
       ? Math.max(uiAvailableHeight - 1, 4)
       : Math.floor(terminalHeight * 0.5);
 
+  const isRoutine =
+    tool.confirmationDetails?.type === 'ask_user' ||
+    tool.confirmationDetails?.type === 'exit_plan_mode';
+  const borderColor = isRoutine ? theme.status.success : theme.status.warning;
+  const hideToolIdentity = isRoutine;
+
   // ToolConfirmationMessage needs to know the height available for its OWN content.
   // We subtract the lines used by the Queue wrapper:
   // - 2 lines for the rounded border
@@ -67,15 +73,9 @@ export const ToolConfirmationQueue: React.FC<ToolConfirmationQueueProps> = ({
   // - 2 lines for Tool Identity (text + margin)
   const availableContentHeight =
     constrainHeight && !isAlternateBuffer
-      ? Math.max(maxHeight - 6, 4)
+      ? Math.max(maxHeight - (hideToolIdentity ? 4 : 6), 4)
       : undefined;
 
-  const isRoutine =
-    tool.confirmationDetails?.type === 'ask_user' ||
-    tool.confirmationDetails?.type === 'exit_plan_mode';
-  const borderColor = isRoutine ? theme.status.success : theme.status.warning;
-  const hideToolIdentity = isRoutine;
-
   return (
     <OverflowProvider>
       <Box flexDirection="column" width={mainAreaWidth} flexShrink={0}>
diff --git a/packages/cli/src/ui/components/__snapshots__/ToolConfirmationQueue.test.tsx.snap b/packages/cli/src/ui/components/__snapshots__/ToolConfirmationQueue.test.tsx.snap
index aad58b92a7..f8ba499abd 100644
--- a/packages/cli/src/ui/components/__snapshots__/ToolConfirmationQueue.test.tsx.snap
+++ b/packages/cli/src/ui/components/__snapshots__/ToolConfirmationQueue.test.tsx.snap
@@ -40,6 +40,25 @@ exports[`ToolConfirmationQueue > does not render expansion hint when constrainHe
 ╰──────────────────────────────────────────────────────────────────────────────╯"
 `;
 
+exports[`ToolConfirmationQueue > provides more height for ask_user by subtracting less overhead 1`] = `
+"╭──────────────────────────────────────────────────────────────────────────────╮
+│ Answer Questions                                                             │
+│                                                                              │
+│ Line 1                                                                       │
+│ Line 2                                                                       │
+│ Line 3                                                                       │
+│ Line 4                                                                       │
+│ Line 5                                                                       │
+│ Line 6                                                                       │
+│                                                                              │
+│ ● 1.  Option 1                                                               │
+│       Desc                                                                   │
+│   2.  Enter a custom value                                                   │
+│                                                                              │
+│ Enter to select · ↑/↓ to navigate · Esc to cancel                            │
+╰──────────────────────────────────────────────────────────────────────────────╯"
+`;
+
 exports[`ToolConfirmationQueue > renders AskUser tool confirmation with Success color 1`] = `
 "╭──────────────────────────────────────────────────────────────────────────────╮
 │ Answer Questions                                                             │
diff --git a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
index 13feb1682f..42642d66f9 100644
--- a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
+++ b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
@@ -235,6 +235,10 @@ export const ToolConfirmationMessage: React.FC<
       return undefined;
     }
 
+    if (handlesOwnUI) {
+      return availableTerminalHeight;
+    }
+
     // Calculate the vertical space (in lines) consumed by UI elements
     // surrounding the main body content.
     const PADDING_OUTER_Y = 2; // Main container has `padding={1}` (top & bottom).
@@ -253,7 +257,7 @@ export const ToolConfirmationMessage: React.FC<
       1; // Reserve one line for 'ShowMoreLines' hint
 
     return Math.max(availableTerminalHeight - surroundingElementsHeight, 1);
-  }, [availableTerminalHeight, getOptions]);
+  }, [availableTerminalHeight, getOptions, handlesOwnUI]);
 
   const { question, bodyContent, options } = useMemo(() => {
     let bodyContent: React.ReactNode | null = null;