diff --git a/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs
new file mode 100644
index 0000000000..bce62a2d73
--- /dev/null
+++ b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs
@@ -0,0 +1,13 @@
+namespace io.github.hatayama.UnityCliLoop.Tests.PausePointToolsFixtures
+{
+    internal sealed class PerFrameTraceNoticeFixture
+    {
+        private int _probe;
+
+        public void Update()
+        {
+            // per-frame-trace-notice-probe-unique
+            _probe = 1;
+        }
+    }
+}
diff --git a/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs.meta b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs.meta
new file mode 100644
index 0000000000..66062262d7
--- /dev/null
+++ b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 43b9134fcf54f43518d1795eb650c946
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs
new file mode 100644
index 0000000000..2a726a9e7c
--- /dev/null
+++ b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs
@@ -0,0 +1,193 @@
+using System;
+using System.IO;
+
+using NUnit.Framework;
+
+using io.github.hatayama.UnityCliLoop.FirstPartyTools;
+using io.github.hatayama.UnityCliLoop.Runtime;
+using io.github.hatayama.UnityCliLoop.ToolContracts;
+
+namespace io.github.hatayama.UnityCliLoop.Tests.Editor
+{
+    /// <summary>
+    /// Verifies the enable-time notice when a trace marker's method name matches a per-frame Unity message.
+    /// </summary>
+    [TestFixture]
+    public sealed class PausePointPerFrameTraceNoticeTests
+    {
+        private const string FixtureFilePath = "Assets/Tests/Editor/PausePointPerFrameTraceNoticeFixture.cs";
+
+        private const string PlayerUpdateNotice =
+            "'Player.Update' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.";
+
+        [SetUp]
+        public void SetUp()
+        {
+            UloopPausePointRegistry.ConfigureForTests(new FakePausePointPauseController(), () => DateTime.UtcNow);
+        }
+
+        [TearDown]
+        public void TearDown()
+        {
+            SourcePausePointPatcher.UnpatchAll();
+            UloopPausePointRegistry.ResetForTests();
+        }
+
+        /// <summary>
+        /// What: trace on Update / FixedUpdate / LateUpdate / OnGUI appends the per-frame notice.
+        /// </summary>
+        [TestCase(
+            "Player.Update",
+            "'Player.Update' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.")]
+        [TestCase(
+            "Player.FixedUpdate",
+            "'Player.FixedUpdate' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.")]
+        [TestCase(
+            "Player.LateUpdate",
+            "'Player.LateUpdate' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.")]
+        [TestCase(
+            "Player.OnGUI",
+            "'Player.OnGUI' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.")]
+        public void BuildPerFrameTraceWarningOrEmpty_WhenTraceAndPerFrameMessage_ReturnsNotice(
+            string resolvedMethod,
+            string expectedNotice)
+        {
+            string warning = PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                UloopPausePointCaptureMode.Trace,
+                resolvedMethod,
+                8);
+
+            Assert.That(warning, Is.EqualTo(expectedNotice));
+        }
+
+        /// <summary>
+        /// What: a Cecil FullName resolved method still interpolates Type.Method into the notice.
+        /// </summary>
+        [Test]
+        public void BuildPerFrameTraceWarningOrEmpty_WhenResolvedMethodIsCecilFullName_FormatsTypeMethod()
+        {
+            string warning = PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                UloopPausePointCaptureMode.Trace,
+                "System.Void Ns.Player::Update()",
+                8);
+
+            Assert.That(warning, Is.EqualTo(PlayerUpdateNotice));
+        }
+
+        /// <summary>
+        /// What: non-trace capture modes stay silent even when the method name matches a per-frame Unity message.
+        /// </summary>
+        [TestCase(UloopPausePointCaptureMode.SingleShot)]
+        [TestCase(UloopPausePointCaptureMode.Continuous)]
+        public void BuildPerFrameTraceWarningOrEmpty_WhenModeIsNotTrace_ReturnsEmpty(string captureMode)
+        {
+            string warning = PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                captureMode,
+                "Player.Update",
+                8);
+
+            Assert.That(warning, Is.EqualTo(string.Empty));
+        }
+
+        /// <summary>
+        /// What: a method whose simple name is not a per-frame Unity message stays silent in trace.
+        /// </summary>
+        [TestCase("Player.Start")]
+        [TestCase("Player.UpdateWeather")]
+        [TestCase("Player.OnGUILayout")]
+        public void BuildPerFrameTraceWarningOrEmpty_WhenSimpleNameIsNotPerFrame_ReturnsEmpty(string resolvedMethod)
+        {
+            string warning = PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                UloopPausePointCaptureMode.Trace,
+                resolvedMethod,
+                8);
+
+            Assert.That(warning, Is.EqualTo(string.Empty));
+        }
+
+        /// <summary>
+        /// What: the per-frame notice is appended after an existing enable warning.
+        /// </summary>
+        [Test]
+        public void MergeWarnings_WhenPriorWarningAndPerFrameNotice_AppendsNoticeAfterPrior()
+        {
+            string prior = "Pause point was enabled before PlayMode while Domain Reload is enabled. Entering PlayMode may clear this marker; keep Domain Reload disabled for this workflow or enable the marker after PlayMode starts.";
+            string notice = PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                UloopPausePointCaptureMode.Trace,
+                "Player.Update",
+                8);
+
+            string merged = PausePointEnableWarnings.MergeWarnings(prior, notice);
+
+            Assert.That(
+                merged,
+                Is.EqualTo(
+                    "Pause point was enabled before PlayMode while Domain Reload is enabled. Entering PlayMode may clear this marker; keep Domain Reload disabled for this workflow or enable the marker after PlayMode starts. 'Player.Update' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history."));
+        }
+
+        /// <summary>
+        /// What: enable with file:line trace on Update appends the per-frame notice using the effective max-history.
+        /// </summary>
+        [Test]
+        public void Enable_WhenTraceMarkerIsOnUpdate_AppendsPerFrameNotice()
+        {
+            string absolutePath = Path.Combine(UnityCliLoopPathResolver.GetProjectRoot(), FixtureFilePath);
+            string diskSource = File.ReadAllText(absolutePath);
+            int requestedLine = FindLineNumberContaining(diskSource, "per-frame-trace-notice" + "-probe-unique") + 1;
+            Assert.That(requestedLine, Is.GreaterThan(1));
+
+            PausePointResponse response = new PausePointUseCase().Enable(new EnablePausePointSchema
+            {
+                File = FixtureFilePath,
+                Line = requestedLine,
+                TimeoutSeconds = 30,
+                Mode = UloopPausePointCaptureMode.Trace,
+                MaxHistory = 8
+            });
+
+            Assert.That(
+                response.Success,
+                Is.True,
+                response.ErrorCode + " / " + response.Message + " / " + response.RecommendedNextAction);
+            string notice =
+                "'PerFrameTraceNoticeFixture.Update' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max 8) over within moments. Prefer a conditional line or a larger --max-history.";
+            string expectedWarning = PausePointEnableWarnings.MergeWarnings(
+                PausePointEnableWarnings.MergeWarnings(
+                    PausePointEnableWarnings.CreateEnableWarning(),
+                    SourcePausePointConstants.SmallMethodInliningRiskWarning),
+                notice);
+            Assert.That(response.Warning, Is.EqualTo(expectedWarning));
+        }
+
+        private static int FindLineNumberContaining(string source, string fragment)
+        {
+            string[] lines = source.Replace("\r\n", "\n").Split('\n');
+            for (int index = 0; index < lines.Length; index++)
+            {
+                if (lines[index].Contains(fragment))
+                {
+                    return index + 1;
+                }
+            }
+
+            return -1;
+        }
+
+        private sealed class FakePausePointPauseController : IUloopPausePointPauseController
+        {
+            public int PauseCount { get; private set; }
+            public bool IsPlaying => true;
+            public bool IsPaused => PauseCount > 0;
+
+            public void Pause()
+            {
+                PauseCount++;
+            }
+
+            public void Resume()
+            {
+                PauseCount = 0;
+            }
+        }
+    }
+}
diff --git a/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs.meta b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs.meta
new file mode 100644
index 0000000000..524bd7c4d7
--- /dev/null
+++ b/Assets/Tests/Editor/PausePointPerFrameTraceNoticeTests.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 62b5760e71a0749369cde866c6585466
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointEnableWarnings.cs b/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointEnableWarnings.cs
index 6c858ab08a..51b5d24308 100644
--- a/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointEnableWarnings.cs
+++ b/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointEnableWarnings.cs
@@ -65,6 +65,80 @@ internal static string MergeWarnings(string first, string second)
             return first + " " + second;
         }
 
+        // Why Type.Method in the notice: enable's resolved-method string is Cecil FullName, but
+        // the warning should name the Unity message the same way agents already read caller frames.
+        internal static string BuildPerFrameTraceWarningOrEmpty(
+            string captureMode,
+            string resolvedMethod,
+            int maxHistory)
+        {
+            if (captureMode != UloopPausePointCaptureMode.Trace || string.IsNullOrEmpty(resolvedMethod))
+            {
+                return string.Empty;
+            }
+
+            string simpleName = ExtractSimpleMethodName(resolvedMethod);
+            if (!IsPerFrameUnityMessageSimpleName(simpleName))
+            {
+                return string.Empty;
+            }
+
+            return string.Format(
+                SourcePausePointConstants.PerFrameTraceNoticeFormat,
+                FormatTypeMethodDisplay(resolvedMethod, simpleName),
+                maxHistory);
+        }
+
+        private static bool IsPerFrameUnityMessageSimpleName(string simpleName)
+        {
+            return simpleName == "Update"
+                || simpleName == "FixedUpdate"
+                || simpleName == "LateUpdate"
+                || simpleName == "OnGUI";
+        }
+
+        private static string ExtractSimpleMethodName(string resolvedMethod)
+        {
+            int colon = resolvedMethod.IndexOf("::", StringComparison.Ordinal);
+            if (colon >= 0)
+            {
+                int start = colon + 2;
+                int paren = resolvedMethod.IndexOf('(', start);
+                if (paren >= 0)
+                {
+                    return resolvedMethod.Substring(start, paren - start);
+                }
+
+                return resolvedMethod.Substring(start);
+            }
+
+            int lastDot = resolvedMethod.LastIndexOf('.');
+            string tail = lastDot >= 0 ? resolvedMethod.Substring(lastDot + 1) : resolvedMethod;
+            int tailParen = tail.IndexOf('(');
+            if (tailParen >= 0)
+            {
+                return tail.Substring(0, tailParen);
+            }
+
+            return tail;
+        }
+
+        private static string FormatTypeMethodDisplay(string resolvedMethod, string simpleName)
+        {
+            int colon = resolvedMethod.IndexOf("::", StringComparison.Ordinal);
+            if (colon < 0)
+            {
+                return resolvedMethod;
+            }
+
+            string beforeColon = resolvedMethod.Substring(0, colon);
+            int space = beforeColon.LastIndexOf(' ');
+            string typeFullName = space >= 0 ? beforeColon.Substring(space + 1) : beforeColon;
+            int typeSep = Math.Max(typeFullName.LastIndexOf('.'), typeFullName.LastIndexOf('/'));
+            string typeName = typeSep >= 0 ? typeFullName.Substring(typeSep + 1) : typeFullName;
+            return typeName + "." + simpleName;
+        }
+
         // Why success-only: resolve failure leaves ResolvedMethod and ResolvedLineText empty,
         // so this wording would point at fields that are not on the response.
         // Why same resolvedLine on both sides: the resolver rounds empty/comment lines forward,
diff --git a/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointUseCase.cs b/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointUseCase.cs
index d84cab8686..f795bae18c 100644
--- a/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointUseCase.cs
+++ b/Packages/src/Editor/FirstPartyTools/PausePoint/PausePointUseCase.cs
@@ -415,6 +415,12 @@ private static PausePointResponse FinishEnableBySourceLocation(
             response.Warning = PausePointEnableWarnings.MergeWarnings(
                 response.Warning,
                 PausePointEnableWarnings.BuildAddedFieldsNotCapturedWarningOrEmpty(patchResult.DeclaringType));
+            response.Warning = PausePointEnableWarnings.MergeWarnings(
+                response.Warning,
+                PausePointEnableWarnings.BuildPerFrameTraceWarningOrEmpty(
+                    parameters.Mode,
+                    resolvedMethod,
+                    snapshot.MaxHistory));
             LogEnable(response.Id, response.ResolvedMethod, $"{parameters.File}:{response.ResolvedLine}", response.Mode, response.Warning);
 
             if (patchResult.HasPhysicsCallbackWarning)
diff --git a/Packages/src/Editor/FirstPartyTools/PausePoint/SourcePausePointConstants.cs b/Packages/src/Editor/FirstPartyTools/PausePoint/SourcePausePointConstants.cs
index 8db0234110..1086c77dc0 100644
--- a/Packages/src/Editor/FirstPartyTools/PausePoint/SourcePausePointConstants.cs
+++ b/Packages/src/Editor/FirstPartyTools/PausePoint/SourcePausePointConstants.cs
@@ -140,6 +140,14 @@ internal static class SourcePausePointConstants
             "The target method body is very small and may be inlined by Mono's JIT into its callers; "
             + "if HitCount stays 0 while the line demonstrably runs, move the pause point into the calling method.";
 
+        // Format: Type.Method display name, effective max-history.
+        // Why name-based, not a MonoBehaviour type check: a plain C# Update is often driven
+        // every frame by a MonoBehaviour delegate, and a type check would miss that case.
+        // Why conditional wording: the name match is not proof this is a Unity message, so
+        // "is a per-frame Unity message" would be false for non-MonoBehaviour types.
+        public const string PerFrameTraceNoticeFormat =
+            "'{0}' matches a per-frame Unity message name; if this line runs every frame, capture mode 'trace' can roll the history (max {1}) over within moments. Prefer a conditional line or a larger --max-history.";
+
         // Callers have observed captured values that look like they belong to the line after
         // ResolvedLine; this makes the pre-line snapshot timing explicit in the response itself
         // instead of leaving it documented only in the skill.