diff --git a/apps/playground/src/components/sidebar/ToolsSidebar.tsx b/apps/playground/src/components/sidebar/ToolsSidebar.tsx
index 34687ef..30fac3a 100644
--- a/apps/playground/src/components/sidebar/ToolsSidebar.tsx
+++ b/apps/playground/src/components/sidebar/ToolsSidebar.tsx
@@ -6,17 +6,23 @@ import { Input } from '@tpmjs/ui/Input/Input';
 import { useEffect, useState } from 'react';
 
 interface Tool {
+  toolId?: string;
   packageName: string;
   exportName: string;
   description: string;
   category: string;
   version: string;
+  qualityScore?: number;
+  frameworks?: string[];
+  env?: Record<string, { description: string; required?: boolean }>;
+  importUrl?: string;
 }
 
 export function ToolsSidebar(): React.ReactElement {
   const [tools, setTools] = useState<Tool[]>([]);
   const [loading, setLoading] = useState(true);
   const [filter, setFilter] = useState('');
+  const [selectedTool, setSelectedTool] = useState<Tool | null>(null);
 
   useEffect(() => {
     async function fetchTools() {
@@ -44,49 +50,178 @@ export function ToolsSidebar(): React.ReactElement {
   );
 
   return (
-    <aside className="hidden w-64 border-r border-border bg-surface md:block">
-      <div className="flex h-full flex-col p-4">
-        <h2 className="mb-4 text-lg font-bold">
-          Available Tools <Badge variant="secondary">{filteredTools.length}</Badge>
-        </h2>
+    <>
+      <aside className="hidden w-64 border-r border-border bg-surface md:block">
+        <div className="flex h-full flex-col p-4">
+          <h2 className="mb-4 text-lg font-bold">
+            Available Tools <Badge variant="secondary">{filteredTools.length}</Badge>
+          </h2>
 
-        <Input
-          type="text"
-          placeholder="Filter tools..."
-          value={filter}
-          onChange={(e) => setFilter(e.target.value)}
-          className="mb-4"
-        />
+          <Input
+            type="text"
+            placeholder="Filter tools..."
+            value={filter}
+            onChange={(e) => setFilter(e.target.value)}
+            className="mb-4"
+          />
 
-        <div className="flex-1 space-y-2 overflow-y-auto">
-          {loading ? (
-            <p className="text-sm text-foreground-secondary">Loading tools...</p>
-          ) : filteredTools.length === 0 ? (
-            <p className="text-sm text-foreground-secondary">No tools found</p>
-          ) : (
-            filteredTools.map((tool) => (
-              <Card
-                key={`${tool.packageName}-${tool.exportName}`}
-                variant="outline"
-                className="cursor-pointer hover:bg-background"
-              >
-                <CardHeader>
-                  <CardTitle className="text-sm">{tool.exportName}</CardTitle>
-                </CardHeader>
-                <CardContent>
-                  <p className="text-xs text-foreground-secondary">{tool.description}</p>
-                  <div className="mt-2 flex items-center gap-2">
-                    <Badge variant="secondary" size="sm">
-                      {tool.category}
-                    </Badge>
-                    <span className="text-xs text-foreground-tertiary">v{tool.version}</span>
-                  </div>
-                </CardContent>
-              </Card>
-            ))
-          )}
+          <div className="flex-1 space-y-2 overflow-y-auto">
+            {loading ? (
+              <p className="text-sm text-foreground-secondary">Loading tools...</p>
+            ) : filteredTools.length === 0 ? (
+              <p className="text-sm text-foreground-secondary">No tools found</p>
+            ) : (
+              filteredTools.map((tool) => (
+                <Card
+                  key={`${tool.packageName}-${tool.exportName}`}
+                  variant="outline"
+                  className="cursor-pointer transition-all hover:bg-background hover:shadow-md"
+                  onClick={() => setSelectedTool(tool)}
+                >
+                  <CardHeader>
+                    <CardTitle className="text-sm">{tool.exportName}</CardTitle>
+                    <p className="text-xs text-foreground-tertiary mt-0.5">{tool.packageName}</p>
+                  </CardHeader>
+                  <CardContent>
+                    <p className="text-xs text-foreground-secondary line-clamp-2">
+                      {tool.description}
+                    </p>
+                    <div className="mt-2 flex items-center gap-2">
+                      <Badge variant="secondary" size="sm">
+                        {tool.category}
+                      </Badge>
+                      <span className="text-xs text-foreground-tertiary">v{tool.version}</span>
+                    </div>
+                  </CardContent>
+                </Card>
+              ))
+            )}
+          </div>
         </div>
-      </div>
-    </aside>
+      </aside>
+
+      {/* Tool Details Modal */}
+      {selectedTool && (
+        {/* biome-ignore lint/a11y/useSemanticElements: Modal backdrop - standard pattern for modal overlays with role=button */}
+        <div
+          className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm"
+          onClick={() => setSelectedTool(null)}
+          onKeyDown={(e) => {
+            if (e.key === 'Escape') setSelectedTool(null);
+          }}
+          role="button"
+          tabIndex={0}
+          aria-label="Close modal"
+        >
+          {/* biome-ignore lint/a11y/useKeyWithClickEvents: Modal content - prevents click-through to backdrop */}
+          <div
+            className="relative mx-4 max-h-[90vh] w-full max-w-2xl overflow-y-auto rounded-lg border border-border bg-surface p-6 shadow-xl"
+            onClick={(e) => e.stopPropagation()}
+          >
+            {/* Close button */}
+            <button
+              onClick={() => setSelectedTool(null)}
+              className="absolute right-4 top-4 text-foreground-tertiary hover:text-foreground"
+              aria-label="Close modal"
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                className="h-6 w-6"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+              >
+                <title>Close</title>
+                <path
+                  strokeLinecap="round"
+                  strokeLinejoin="round"
+                  strokeWidth={2}
+                  d="M6 18L18 6M6 6l12 12"
+                />
+              </svg>
+            </button>
+
+            {/* Tool header */}
+            <div className="mb-6 border-b border-border pb-4">
+              <h2 className="mb-2 text-2xl font-bold text-foreground">{selectedTool.exportName}</h2>
+              <p className="mb-2 text-sm text-foreground-secondary">{selectedTool.packageName}</p>
+              <div className="flex items-center gap-2">
+                <Badge variant="secondary">{selectedTool.category}</Badge>
+                <span className="text-sm text-foreground-tertiary">v{selectedTool.version}</span>
+                {selectedTool.qualityScore && (
+                  <Badge variant="info">
+                    Score: {(selectedTool.qualityScore * 100).toFixed(0)}%
+                  </Badge>
+                )}
+              </div>
+            </div>
+
+            {/* Description */}
+            <div className="mb-6">
+              <h3 className="mb-2 text-lg font-semibold text-foreground">Description</h3>
+              <p className="text-sm text-foreground-secondary">{selectedTool.description}</p>
+            </div>
+
+            {/* Frameworks */}
+            {selectedTool.frameworks && selectedTool.frameworks.length > 0 && (
+              <div className="mb-6">
+                <h3 className="mb-2 text-lg font-semibold text-foreground">Frameworks</h3>
+                <div className="flex flex-wrap gap-2">
+                  {selectedTool.frameworks.map((framework) => (
+                    <Badge key={framework} variant="outline" size="sm">
+                      {framework}
+                    </Badge>
+                  ))}
+                </div>
+              </div>
+            )}
+
+            {/* Environment Variables */}
+            {selectedTool.env && Object.keys(selectedTool.env).length > 0 && (
+              <div className="mb-6">
+                <h3 className="mb-2 text-lg font-semibold text-foreground">
+                  Environment Variables
+                </h3>
+                <div className="space-y-2">
+                  {Object.entries(selectedTool.env).map(([key, config]) => (
+                    <div key={key} className="rounded border border-border bg-background p-3">
+                      <div className="mb-1 flex items-center gap-2">
+                        <code className="text-sm font-mono text-foreground">{key}</code>
+                        {config.required && (
+                          <Badge variant="error" size="sm">
+                            Required
+                          </Badge>
+                        )}
+                      </div>
+                      <p className="text-xs text-foreground-secondary">{config.description}</p>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            )}
+
+            {/* Import URL */}
+            {selectedTool.importUrl && (
+              <div className="mb-6">
+                <h3 className="mb-2 text-lg font-semibold text-foreground">Import URL</h3>
+                <code className="block rounded bg-background p-3 text-xs font-mono text-foreground-secondary break-all">
+                  {selectedTool.importUrl}
+                </code>
+              </div>
+            )}
+
+            {/* Tool ID */}
+            {selectedTool.toolId && (
+              <div>
+                <h3 className="mb-2 text-lg font-semibold text-foreground">Tool ID</h3>
+                <code className="block rounded bg-background p-3 text-xs font-mono text-foreground-secondary">
+                  {selectedTool.toolId}
+                </code>
+              </div>
+            )}
+          </div>
+        </div>
+      )}
+    </>
   );
 }