Description - Amazon CloudFormation
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Description

The Description section (optional) enables you to include comments about your template.

The value for the description declaration must be a literal string that is between 0 and 1024 bytes in length. You cannot use a parameter or function to specify the description. The following snippet is an example of a description declaration:

Important

During a stack update, you cannot update the Description section by itself. You can update it only when you include changes that add, modify, or delete resources.

JSON

"Description" : "Here are some details about the template."

YAML

Description: > Here are some details about the template.