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diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java
new file mode 100644
index 000000000..b581b4cd8
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java
@@ -0,0 +1,90 @@
+package org.simantics.browsing.ui.model.tooltips;
+
+import java.util.Map;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.FontMetrics;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Text;
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.variable.Variable;
+import org.simantics.layer0.Layer0;
+
+public class DescriptionTooltipRule implements TooltipRule {
+    
+    public static final DescriptionTooltipRule INSTANCE = new DescriptionTooltipRule();
+    
+    public DescriptionTooltipRule() {
+    }
+
+    @Override
+    public Object createTooltip(Object event, Object parentComponent, NodeContext context, Map<Object, Object> auxiliary) {
+        Composite parent = (Composite)parentComponent;
+        Composite composite = new Composite(parent, SWT.NONE);
+        //ScrolledComposite composite = new ScrolledComposite(parent, SWT.NONE);
+        
+        composite.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));
+        GridLayout layout = new GridLayout(1, false);
+        composite.setLayout(layout);
+        Text text = new Text(composite, SWT.NONE | SWT.READ_ONLY | SWT.WRAP);
+        text.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));
+        
+        String toolTipContent = (String) auxiliary.get("content");
+        text.setText(toolTipContent);
+        
+        GC gc = new GC(text);
+        FontMetrics fm = gc.getFontMetrics();
+        int width = toolTipContent.length() * fm.getAverageCharWidth();
+        gc.dispose();
+        GridData gridData = new GridData();
+        if (width < 500)
+            gridData.widthHint = width;
+        else
+            gridData.widthHint = 500;
+        
+        text.setLayoutData(gridData);
+        
+        return composite;
+    }
+
+    @Override
+    public boolean isCompatible(Class<?> contentType) {
+        return (contentType == Resource.class || contentType == Variable.class);
+    }
+    
+    private static String getToolTipContent(ReadGraph graph, NodeContext nodeContext) throws DatabaseException {
+        Object input = nodeContext.getConstant(BuiltinKeys.INPUT);
+        String content = null;
+        if (input instanceof Variable) {
+            Variable var = (Variable) input;
+            Resource res = var.getPredicateResource(graph);
+            Layer0 L0 = Layer0.getInstance(graph);
+            String description = graph.getPossibleRelatedValue2(res, L0.HasDescription);
+            return description;
+        } else if (input instanceof Resource) {
+            Resource res = (Resource) input;
+
+            Layer0 L0 = Layer0.getInstance(graph);
+            String description = graph.getPossibleRelatedValue2(res, L0.HasDescription);
+            return description;
+        }
+        return content;
+    }
+
+    @Override
+    public boolean shouldCreateToolTip(ReadGraph graph  , NodeContext context, Map<Object, Object> auxiliary) throws DatabaseException {
+        String content = getToolTipContent(graph, context);
+        if (content == null || content.isEmpty())
+            return false;
+        auxiliary.put("content", content);
+        return true;
+    }
+
+}