diff --git a/ax/core/analysis_card.py b/ax/core/analysis_card.py
index 1c76068cfe9..497c7ace31b 100644
--- a/ax/core/analysis_card.py
+++ b/ax/core/analysis_card.py
@@ -19,7 +19,10 @@
 from plotly.offline import get_plotlyjs
 
 # Simple HTML template for rendering a card with a title, subtitle, and body with
-# scrollable overflow.
+# scrollable overflow. Subtitles are rendered in a <div> with max-height overflow
+# so that any HTML content (tables, lists, etc.) is valid and clipped correctly
+# in the collapsed state. A "See more"/"See less" toggle appears when content
+# overflows (matching the web UI pattern).
 html_card_template = """
 <style>
 .card {{
@@ -30,34 +33,66 @@
     border-radius: 0.5em;
     padding: 10px;
 }}
-.card-header:hover {{
-    cursor: pointer;
-}}
-.card-header details summary {{
-    list-style: none;
-    display: inline-flex;
-    align-items: center;
-    gap: 0.5em;
+.card-subtitle {{
+    color: gray;
+    font-size: 0.9em;
+    margin: 4px 0 0 0;
+    line-height: 1.4em;
+    max-height: 1.4em;
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
 }}
-.card-header details summary::-webkit-details-marker {{
+.card-subtitle-toggle {{
+    color: #1877F2;
+    cursor: pointer;
+    font-size: 0.85em;
+    background: none;
+    border: none;
+    padding: 0;
+    margin-top: 2px;
     display: none;
 }}
-.card-header details summary::after {{
-    content: "ℹ️";
-    font-size: 0.9em;
-}}
 </style>
 <div class="card">
     <div class="card-header">
-        <details>
-            <summary><b>{title_str}</b></summary>
-            <p>{subtitle_str}</p>
-        </details>
+        <b>{title_str}</b>
+        <div class="card-subtitle">{subtitle_str}</div>
+        <button class="card-subtitle-toggle">{toggle_text}</button>
     </div>
     <div class="card-body">
         {body_html}
     </div>
 </div>
+<script>
+(function() {{
+    var card = document.currentScript.previousElementSibling;
+    var subtitle = card.querySelector('.card-subtitle');
+    var toggle = card.querySelector('.card-subtitle-toggle');
+    if (subtitle && toggle) {{
+        var originalText = toggle.textContent;
+        requestAnimationFrame(function() {{
+            if (subtitle.scrollHeight > subtitle.clientHeight
+                    || subtitle.scrollWidth > subtitle.clientWidth) {{
+                toggle.style.display = 'inline';
+            }}
+        }});
+        toggle.onclick = function() {{
+            if (subtitle.style.maxHeight === 'none') {{
+                subtitle.style.maxHeight = '1.4em';
+                subtitle.style.whiteSpace = 'nowrap';
+                subtitle.style.textOverflow = 'ellipsis';
+                toggle.textContent = originalText;
+            }} else {{
+                subtitle.style.maxHeight = 'none';
+                subtitle.style.whiteSpace = 'normal';
+                subtitle.style.textOverflow = 'clip';
+                toggle.textContent = 'See less';
+            }}
+        }};
+    }}
+}})();
+</script>
 """
 
 # Simple HTML template for rendering a *group* card with a title, subtitle, and
@@ -120,6 +155,7 @@ class AnalysisCardBase(SortableBase, ABC):
 
     title: str
     subtitle: str
+    subtitle_toggle_label: str
 
     _timestamp: datetime
 
@@ -129,6 +165,7 @@ def __init__(
         title: str,
         subtitle: str,
         timestamp: datetime | None = None,
+        subtitle_toggle_label: str = "",
     ) -> None:
         """
         Args:
@@ -141,10 +178,14 @@ def __init__(
             timestamp: The time at which the Analysis was computed. This can be
                 especially useful when querying the database for the most recently
                 produced artifacts.
+            subtitle_toggle_label: Custom label for the subtitle expansion
+                toggle. When non-empty, replaces the default "See more" text. Persisted to
+                storage and used by both notebook and web UI rendering.
         """
         self.name = name
         self.title = title
         self.subtitle = subtitle
+        self.subtitle_toggle_label = subtitle_toggle_label
         self._timestamp = timestamp if timestamp is not None else datetime.now()
 
     @abstractmethod
@@ -224,10 +265,12 @@ def _repr_html_(self) -> str:
         return plotlyjs_script + self._to_html(depth=0)
 
     def _to_html(self, depth: int) -> str:
+        toggle_text = self.subtitle_toggle_label or "See more"
         return html_card_template.format(
             title_str=self.title,
             subtitle_str=self.subtitle,
             body_html=self._body_html(depth=depth),
+            toggle_text=toggle_text,
         )
 
 
@@ -248,6 +291,7 @@ def __init__(
         subtitle: str | None,
         children: Sequence[AnalysisCardBase],
         timestamp: datetime | None = None,
+        subtitle_toggle_label: str = "",
     ) -> None:
         """
         Args:
@@ -260,12 +304,15 @@ def __init__(
             timestamp: The time at which the Analysis was computed. This can be
                 especially useful when querying the database for the most recently
                 produced artifacts.
+            subtitle_toggle_label: Custom label for the subtitle expansion
+                toggle. When non-empty, replaces the default "See more" text
         """
         super().__init__(
             name=name,
             title=title,
             subtitle=subtitle if subtitle is not None else "",
             timestamp=timestamp,
+            subtitle_toggle_label=subtitle_toggle_label,
         )
 
         self.children = [
@@ -370,6 +417,7 @@ def __init__(
         df: pd.DataFrame,
         blob: str,
         timestamp: datetime | None = None,
+        subtitle_toggle_label: str = "",
     ) -> None:
         """
         Args:
@@ -383,12 +431,15 @@ def __init__(
             timestamp: The time at which the Analysis was computed. This can be
                 especially useful when querying the database for the most recently
                 produced artifacts.
+            subtitle_toggle_label: Custom label for the subtitle expansion
+                toggle. When non-empty, replaces the default "See more" text
         """
         super().__init__(
             name=name,
             title=title,
             subtitle=subtitle,
             timestamp=timestamp,
+            subtitle_toggle_label=subtitle_toggle_label,
         )
 
         self.df = df
diff --git a/ax/core/tests/test_analysis_card.py b/ax/core/tests/test_analysis_card.py
index a092814e157..aee09ebea57 100644
--- a/ax/core/tests/test_analysis_card.py
+++ b/ax/core/tests/test_analysis_card.py
@@ -78,3 +78,25 @@ def test_not_applicable_card(self) -> None:
             blob="Explanation text.",
         )
         self.assertIn("Explanation text.", card._body_html(depth=0))
+
+    def test_subtitle_toggle_label_rendering(self) -> None:
+        """Verify subtitle_toggle_label controls toggle button text in HTML."""
+        for label, expected_text in (
+            ("", "See more"),
+            (
+                "Expand to see annotated parameters.",
+                "Expand to see annotated parameters.",
+            ),
+        ):
+            with self.subTest():
+                card = AnalysisCard(
+                    name="Test",
+                    title="Title",
+                    subtitle="A long subtitle",
+                    df=pd.DataFrame(),
+                    blob="blob",
+                    subtitle_toggle_label=label,
+                )
+                self.assertEqual(card.subtitle_toggle_label, label)
+                html = card._repr_html_()
+                self.assertIn(expected_text, html)
diff --git a/ax/storage/json_store/encoders.py b/ax/storage/json_store/encoders.py
index d6f960ffdcc..d2f61e3192a 100644
--- a/ax/storage/json_store/encoders.py
+++ b/ax/storage/json_store/encoders.py
@@ -89,6 +89,7 @@ def analysis_card_to_dict(card: AnalysisCard) -> dict[str, Any]:
         "df": card.df,
         "blob": card.blob,
         "timestamp": card._timestamp,
+        "subtitle_toggle_label": card.subtitle_toggle_label,
     }
 
 
@@ -101,6 +102,7 @@ def analysis_card_group_to_dict(group: AnalysisCardGroup) -> dict[str, Any]:
         "subtitle": group.subtitle,
         "children": group.children,
         "timestamp": group._timestamp,
+        "subtitle_toggle_label": group.subtitle_toggle_label,
     }
 
 
diff --git a/ax/storage/json_store/tests/test_json_store.py b/ax/storage/json_store/tests/test_json_store.py
index 783bfce31d9..f73ab81256b 100644
--- a/ax/storage/json_store/tests/test_json_store.py
+++ b/ax/storage/json_store/tests/test_json_store.py
@@ -421,6 +421,7 @@
             subtitle="subtitle",
             df=pd.DataFrame({"a": [1, 2]}),
             blob="blob_str",
+            subtitle_toggle_label="Expand to see details.",
         ),
     ),
     (
@@ -495,6 +496,7 @@
                     blob="# md",
                 ),
             ],
+            subtitle_toggle_label="Expand to see children.",
         ),
     ),
 ]
diff --git a/ax/storage/sqa_store/decoder.py b/ax/storage/sqa_store/decoder.py
index 9fb27215f44..c2426bffc10 100644
--- a/ax/storage/sqa_store/decoder.py
+++ b/ax/storage/sqa_store/decoder.py
@@ -1163,6 +1163,7 @@ def analysis_card_from_sqa(
                 analysis_card_sqa.title if analysis_card_sqa.title is not None else ""
             )
             subtitle = analysis_card_sqa.subtitle
+            subtitle_toggle_label = analysis_card_sqa.subtitle_toggle_label or ""
 
             return AnalysisCardGroup(
                 name=analysis_card_sqa.name,
@@ -1170,12 +1171,14 @@ def analysis_card_from_sqa(
                 subtitle=subtitle,
                 children=children,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
 
         title = none_throws(analysis_card_sqa.title)
         subtitle = none_throws(analysis_card_sqa.subtitle)
         blob = none_throws(analysis_card_sqa.blob)
         blob_annotation = analysis_card_sqa.blob_annotation
+        subtitle_toggle_label = analysis_card_sqa.subtitle_toggle_label or ""
 
         if blob_annotation == "not_applicable_state":
             return NotApplicableStateAnalysisCard(
@@ -1185,6 +1188,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         if blob_annotation == "error":
             return ErrorAnalysisCard(
@@ -1194,6 +1198,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         if blob_annotation == "plotly":
             return PlotlyAnalysisCard(
@@ -1203,6 +1208,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         if blob_annotation == "markdown":
             return MarkdownAnalysisCard(
@@ -1212,6 +1218,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         if blob_annotation == "healthcheck":
             return HealthcheckAnalysisCard(
@@ -1221,6 +1228,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         if blob_annotation == "graphviz":
             return GraphvizAnalysisCard(
@@ -1230,6 +1238,7 @@ def analysis_card_from_sqa(
                 df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
                 blob=blob,
                 timestamp=analysis_card_sqa.timestamp,
+                subtitle_toggle_label=subtitle_toggle_label,
             )
         return AnalysisCard(
             name=analysis_card_sqa.name,
@@ -1238,6 +1247,7 @@ def analysis_card_from_sqa(
             df=read_json(StringIO(analysis_card_sqa.dataframe_json)),
             blob=blob,
             timestamp=analysis_card_sqa.timestamp,
+            subtitle_toggle_label=subtitle_toggle_label,
         )
 
     def _metric_from_sqa_util(self, metric_sqa: SQAMetric) -> Metric:
diff --git a/ax/storage/sqa_store/encoder.py b/ax/storage/sqa_store/encoder.py
index 63ab30eaa41..9bd980e426f 100644
--- a/ax/storage/sqa_store/encoder.py
+++ b/ax/storage/sqa_store/encoder.py
@@ -1264,6 +1264,7 @@ def analysis_card_to_sqa(
                 dataframe_json=None,
                 blob=None,
                 blob_annotation=None,
+                subtitle_toggle_label=analysis_card.subtitle_toggle_label or None,
             )
 
             for i, child_card in enumerate(analysis_card.children):
@@ -1304,4 +1305,5 @@ def analysis_card_to_sqa(
             dataframe_json=card.df.to_json(),
             blob=card.blob,
             blob_annotation=blob_annotation,
+            subtitle_toggle_label=card.subtitle_toggle_label or None,
         )
diff --git a/ax/storage/sqa_store/sqa_classes.py b/ax/storage/sqa_store/sqa_classes.py
index ee656e8483a..5547030d950 100644
--- a/ax/storage/sqa_store/sqa_classes.py
+++ b/ax/storage/sqa_store/sqa_classes.py
@@ -455,6 +455,9 @@ class SQAAnalysisCard(Base):
     blob_annotation: Column[str | None] = Column(
         String(NAME_OR_TYPE_FIELD_LENGTH), nullable=True
     )
+    subtitle_toggle_label: Column[str | None] = Column(
+        "subtitle_toggle_label", String(LONG_STRING_FIELD_LENGTH), nullable=True
+    )
     parent: Any = relationship(
         "SQAAnalysisCard",
         back_populates="children",
diff --git a/ax/storage/sqa_store/tests/test_sqa_store.py b/ax/storage/sqa_store/tests/test_sqa_store.py
index 07de5407c20..8e1f7eb7dda 100644
--- a/ax/storage/sqa_store/tests/test_sqa_store.py
+++ b/ax/storage/sqa_store/tests/test_sqa_store.py
@@ -3015,6 +3015,7 @@ def test_analysis_card(self) -> None:
             subtitle="test_subtitle",
             df=test_df,
             blob="test blob",
+            subtitle_toggle_label="Expand to see details.",
         )
         markdown_analysis_card = MarkdownAnalysisCard(
             name="test_markdown_analysis_card",
@@ -3038,6 +3039,7 @@ def test_analysis_card(self) -> None:
             title="Small Group",
             subtitle="This is a small group with just a few cards",
             children=[base_analysis_card, markdown_analysis_card, plotly_analysis_card],
+            subtitle_toggle_label="Expand to see group children.",
         )
         big_group = AnalysisCardGroup(
             name="big_group",
@@ -3067,12 +3069,14 @@ def test_analysis_card(self) -> None:
             self.assertEqual(loaded_big_group.name, big_group.name)
             self.assertEqual(loaded_big_group.title, big_group.title)
             self.assertEqual(loaded_big_group.subtitle, big_group.subtitle)
+            self.assertEqual(loaded_big_group.subtitle_toggle_label, "")
 
             loaded_big_group_plotly = assert_is_instance(
                 loaded_big_group.children[0], PlotlyAnalysisCard
             )
             self.assertEqual(loaded_big_group_plotly.name, plotly_analysis_card.name)
             self.assertEqual(loaded_big_group_plotly.blob, plotly_analysis_card.blob)
+            self.assertEqual(loaded_big_group_plotly.subtitle_toggle_label, "")
 
             loaded_small_group = assert_is_instance(
                 loaded_big_group.children[1], AnalysisCardGroup
@@ -3080,24 +3084,33 @@ def test_analysis_card(self) -> None:
             self.assertEqual(loaded_small_group.name, small_group.name)
             self.assertEqual(loaded_small_group.title, small_group.title)
             self.assertEqual(loaded_small_group.subtitle, small_group.subtitle)
+            self.assertEqual(
+                loaded_small_group.subtitle_toggle_label,
+                "Expand to see group children.",
+            )
 
             loaded_base = assert_is_instance(
                 loaded_small_group.children[0], AnalysisCard
             )
             self.assertEqual(loaded_base.name, base_analysis_card.name)
             self.assertEqual(loaded_base.blob, base_analysis_card.blob)
+            self.assertEqual(
+                loaded_base.subtitle_toggle_label, "Expand to see details."
+            )
 
             loaded_markdown = assert_is_instance(
                 loaded_small_group.children[1], MarkdownAnalysisCard
             )
             self.assertEqual(loaded_markdown.name, markdown_analysis_card.name)
             self.assertEqual(loaded_markdown.blob, markdown_analysis_card.blob)
+            self.assertEqual(loaded_markdown.subtitle_toggle_label, "")
 
             loaded_small_group_plotly = assert_is_instance(
                 loaded_small_group.children[2], PlotlyAnalysisCard
             )
             self.assertEqual(loaded_small_group_plotly.name, plotly_analysis_card.name)
             self.assertEqual(loaded_small_group_plotly.blob, plotly_analysis_card.blob)
+            self.assertEqual(loaded_small_group_plotly.subtitle_toggle_label, "")
 
     def test_delete_generation_strategy(self) -> None:
         # GIVEN an experiment with a generation strategy