Adding subheadings

Author: ajosh0504

docs/50-agent-tools/3-create-agent-tools.mdx

@@ -12,6 +12,8 @@ Fill in any `<CODE_BLOCK_N>` placeholders and run the cells under the **Step 4:
 
 The answers for code blocks in this section are as follows:
 
+## Vector search tool
+
 **CODE_BLOCK_5**
 
 <details>
@@ -73,6 +75,8 @@ vs_collection.aggregate(pipeline)
 </div>
 </details>
 
+## Get page content tool
+
 **CODE_BLOCK_9**
 
 <details>