fix: operation collection name

Co-authored-by: Dale Seo <[email protected]>

Author: mabuyo

docs/source/define-tools.mdx

@@ -58,7 +58,7 @@ Use the `operations.source: collection` option to specify that tools should be l
 
 Specify the collection to use with the `operations.id` option. To view the ID of a collection, click the ••• button next to its entry, select **View details**, and copy the **Collection ID**.
 
-Each graph variant has its own default collection called **MCP Tools**. To use this default collection, specify `operations.id: default`.
+Each graph variant has its own default collection called **Default MCP Tools**. To use this default collection, specify `operations.id: default`.
 
 ```yaml title="Example config file for using the default MCP Tools operation collection"
 operations: