diff --git a/src/client/components/ToolResultCard.js b/src/client/components/ToolResultCard.js
new file mode 100644
index 00000000..8b63f325
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+++ b/src/client/components/ToolResultCard.js
@@ -0,0 +1,108 @@
+import React, { useState } from "react"
+import PropTypes from "prop-types"
+import { IconCalendarEvent, IconUser, IconChevronDown, IconChevronUp, IconExternalLink } from "@tabler/icons-react"
+
+/**
+ * ToolResultCard Component - Displays a tool result (e.g., event details) in a styled card.
+ *
+ * @param {object} props - Component props.
+ * @param {string} props.title - Main title of the result (e.g., event name).
+ * @param {string} [props.subtitle] - Subtitle or secondary info (e.g., date/time).
+ * @param {object|array} [props.details] - Additional details (object or array of key-value pairs).
+ * @param {array} [props.attendees] - List of attendees (array of strings or objects).
+ * @param {string} [props.externalLink] - Optional external link for more info.
+ * @returns {React.ReactNode}
+ */
+const ToolResultCard = ({ title, subtitle, details, attendees, externalLink }) => {
+  const [expanded, setExpanded] = useState(false)
+
+  const handleToggle = () => setExpanded((prev) => !prev)
+
+  return (
+    <div className="w-full bg-[var(--color-primary-surface)] rounded-lg p-4 mb-4 border border-[var(--color-accent-blue)]">
+      {/* Header */}
+      <div className="flex items-center gap-2 mb-2">
+        <IconCalendarEvent className="w-6 h-6 text-[var(--color-accent-blue)]" />
+        <h3 className="text-lg font-semibold text-[var(--color-text-primary)]">{title}</h3>
+        {externalLink && (
+          <a
+            href={externalLink}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="ml-auto text-[var(--color-accent-blue)] hover:underline flex items-center gap-1"
+            aria-label="Open in external app"
+          >
+            <IconExternalLink className="w-4 h-4" />
+            <span className="text-xs">Open</span>
+          </a>
+        )}
+      </div>
+      {subtitle && <div className="text-[var(--color-text-secondary)] text-sm mb-2">{subtitle}</div>}
+      {/* Expand/collapse details */}
+      <button
+        onClick={handleToggle}
+        className="flex items-center gap-1 text-[var(--color-accent-blue)] hover:text-white text-sm mb-2 focus:outline-none"
+        aria-expanded={expanded}
+        aria-controls="tool-result-details"
+      >
+        {expanded ? <IconChevronUp className="w-4 h-4" /> : <IconChevronDown className="w-4 h-4" />}
+        <span>{expanded ? "Hide details" : "Show details"}</span>
+      </button>
+      {expanded && (
+        <div id="tool-result-details" className="mt-2 border-t border-[var(--color-primary-surface-elevated)] pt-2">
+          {/* Render details as key-value pairs if object, or as list if array */}
+          {details && typeof details === "object" && !Array.isArray(details) && (
+            <ul className="mb-2">
+              {Object.entries(details).map(([key, value]) => (
+                <li key={key} className="text-[var(--color-text-primary)] text-sm flex gap-2">
+                  <span className="font-medium">{key}:</span> <span>{String(value)}</span>
+                </li>
+              ))}
+            </ul>
+          )}
+          {details && Array.isArray(details) && (
+            <ul className="mb-2">
+              {details.map((item, idx) => (
+                <li key={idx} className="text-[var(--color-text-primary)] text-sm">{String(item)}</li>
+              ))}
+            </ul>
+          )}
+          {/* Attendees */}
+          {attendees && attendees.length > 0 && (
+            <div className="mt-2">
+              <div className="flex items-center gap-2 mb-1">
+                <IconUser className="w-4 h-4 text-[var(--color-accent-blue)]" />
+                <span className="font-medium text-[var(--color-text-primary)]">Attendees:</span>
+              </div>
+              <ul className="ml-6 list-disc">
+                {attendees.map((att, idx) => (
+                  <li key={idx} className="text-[var(--color-text-secondary)] text-sm">
+                    {typeof att === "string" ? att : att.name || JSON.stringify(att)}
+                  </li>
+                ))}
+              </ul>
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  )
+}
+
+ToolResultCard.propTypes = {
+  title: PropTypes.string.isRequired,
+  subtitle: PropTypes.string,
+  details: PropTypes.oneOfType([
+    PropTypes.object,
+    PropTypes.array
+  ]),
+  attendees: PropTypes.arrayOf(
+    PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.object
+    ])
+  ),
+  externalLink: PropTypes.string
+}
+
+export default ToolResultCard 
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