diff --git a/packages/editor/src/hooks/use-drag-action.ts b/packages/editor/src/hooks/use-drag-action.ts
index c66b2bd3..97674f79 100644
--- a/packages/editor/src/hooks/use-drag-action.ts
+++ b/packages/editor/src/hooks/use-drag-action.ts
@@ -42,6 +42,14 @@ export type UseDragActionArgs<Ctx, Draft> = {
   onCommit?: () => void
   /** Fires once after `action.cancel` (Esc, unmount, or commit-returns-false). */
   onCancel?: () => void
+  /**
+   * Milliseconds after activation during which `grid:click` is swallowed.
+   * Stops the very click that mounted this tool (a DOM button or 3D
+   * handle elsewhere) from cascading into the grid and immediately
+   * committing the drag. Defaults to 150ms — matches the legacy guard
+   * used by every kind-owned tool entered via a click.
+   */
+  activationGraceMs?: number
 }
 
 /**
@@ -72,12 +80,21 @@ export function useDragAction<Ctx, Draft>(args: UseDragActionArgs<Ctx, Draft>) {
 
     session.start(argsRef.current.initial)
 
+    const activatedAt = Date.now()
+    const graceMs = argsRef.current.activationGraceMs ?? 150
+
     const onMove = (event: GridEvent) => {
       const point: readonly [number, number] = [event.localPosition[0], event.localPosition[2]]
       session.move(point, modifiersFromGridEvent(event))
     }
 
-    const onClick = (_event: GridEvent) => {
+    const onClick = (event: GridEvent) => {
+      // Swallow the click that mounted this tool — otherwise the very
+      // first grid:click cascades into commit() before any move().
+      if (Date.now() - activatedAt < graceMs) {
+        event.nativeEvent?.stopPropagation?.()
+        return
+      }
       session.commit()
     }
 
diff --git a/packages/nodes/src/fence/curve-tool.tsx b/packages/nodes/src/fence/curve-tool.tsx
index ed7e642f..63a7525a 100644
--- a/packages/nodes/src/fence/curve-tool.tsx
+++ b/packages/nodes/src/fence/curve-tool.tsx
@@ -1,7 +1,7 @@
 'use client'
 
 import { type FenceNode, getWallMidpointHandlePoint, useScene } from '@pascal-app/core'
-import { CursorSphere, useDragAction, useEditor } from '@pascal-app/editor'
+import { CursorSphere, triggerSFX, useDragAction, useEditor } from '@pascal-app/editor'
 import { useViewer } from '@pascal-app/viewer'
 import { useEffect, useState } from 'react'
 import { curveFenceDragAction } from './actions/curve'
@@ -31,7 +31,8 @@ export const FenceCurveTool: React.FC<{ node: FenceNode }> = ({ node }) => {
     initialHandle.y,
   ])
 
-  const exitCurveMode = () => {
+  const exitCurveMode = (committed: boolean) => {
+    if (committed) triggerSFX('sfx:item-place')
     useViewer.getState().setSelection({ selectedIds: [node.id] })
     useEditor.getState().setCurvingFence(null)
   }
@@ -46,8 +47,8 @@ export const FenceCurveTool: React.FC<{ node: FenceNode }> = ({ node }) => {
       // placeholder until the first grid:move fires.
       point: [initialHandle.x, initialHandle.y],
     },
-    onCommit: exitCurveMode,
-    onCancel: exitCurveMode,
+    onCommit: () => exitCurveMode(true),
+    onCancel: () => exitCurveMode(false),
   })
 
   // Mirror the active curveOffset back into the cursor position. The