diff --git a/apps/api/src/api/tool_types.py b/apps/api/src/api/tool_types.py
index 113c353..37b09cd 100644
--- a/apps/api/src/api/tool_types.py
+++ b/apps/api/src/api/tool_types.py
@@ -406,8 +406,7 @@ async def update_tool_type(
     if tool_type is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="tool type not found")
     
-    if tool_type.is_builtin:
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="cannot modify built-in tool types")
+    # Built-in tool types can now be modified
     
     update_data = data.model_dump(exclude_unset=True)
     
@@ -625,8 +624,7 @@ async def delete_tool_type(
     if tool_type is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="tool type not found")
     
-    if tool_type.is_builtin:
-        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="cannot delete built-in tool types")
+    # Built-in tool types can now be deleted
     
     await session.delete(tool_type)
     await session.commit()
diff --git a/apps/web/src/pages/tool-workshop.tsx b/apps/web/src/pages/tool-workshop.tsx
index a59773a..6eceae4 100644
--- a/apps/web/src/pages/tool-workshop.tsx
+++ b/apps/web/src/pages/tool-workshop.tsx
@@ -561,44 +561,26 @@ export const ToolWorkshopPage = () => {
                   {toolType.category || "Uncategorized"} · {toolType.interface_type === "web" ? `Port ${toolType.default_port}` : "Terminal"}
                 </div>
               </div>
-              {toolType.is_builtin && (
-                <span
-                  style={{
-                    fontSize: "0.625rem",
-                    textTransform: "uppercase",
-                    padding: "0.125rem 0.375rem",
-                    borderRadius: "9999px",
-                    background: selectedToolTypeId === toolType.id ? "rgba(255,255,255,0.25)" : "var(--muted)",
-                    color: selectedToolTypeId === toolType.id ? "white" : "var(--muted)",
-                    fontWeight: 600,
-                    flexShrink: 0,
-                  }}
-                >
-                  Built-in
-                </span>
-              )}
-              {!toolType.is_builtin && (
-                <button
-                  onClick={(e) => {
-                    e.stopPropagation();
-                    handleDeleteToolType(toolType.id);
-                  }}
-                  style={{
-                    background: "none",
-                    border: "none",
-                    color: selectedToolTypeId === toolType.id ? "rgba(255,255,255,0.8)" : "var(--muted)",
-                    cursor: "pointer",
-                    padding: "0.25rem",
-                    borderRadius: "0.25rem",
-                    flexShrink: 0,
-                    opacity: 0,
-                  }}
-                  className="delete-btn"
-                  title="Delete tool type"
-                >
-                  <Icon name="delete" size="sm" />
-                </button>
-              )}
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  handleDeleteToolType(toolType.id);
+                }}
+                style={{
+                  background: "none",
+                  border: "none",
+                  color: selectedToolTypeId === toolType.id ? "rgba(255,255,255,0.8)" : "var(--muted)",
+                  cursor: "pointer",
+                  padding: "0.25rem",
+                  borderRadius: "0.25rem",
+                  flexShrink: 0,
+                  opacity: 0,
+                }}
+                className="delete-btn"
+                title="Delete tool type"
+              >
+                <Icon name="delete" size="sm" />
+              </button>
             </button>
           ))}
         </div>