MongoDB Diagram Design Tool [closed]
If you are looking for a way to create a data model to communicate your design, there are no tools out there specifically created to model json-structured data.
However, you could use UML tools or XML design tools to create your models. I've been less than satisfied with both methods, but it's all I have until some awesome developer builds a json-based data modeling tool.
As @Rex M says in a comment to your question, there are no schemas in Mongo.
There are tools such as MongoVUE which might be of use however.
This looks promising (have not tried it yet):http://3t.io/schema-explorer/http://3t.io/
Here are more Mongo tools:http://mongodb-tools.com/