# Cloud Tag Limitation

The different providers have limitations on the key or value of the tags. If you use two clouds make sure your policy is valid for each of them.

### Clouds

* AWS 
  * [Tagging Your AWS Config Resources](https://docs.aws.amazon.com/config/latest/developerguide/tagging.html)
  * [Tagging AWS resources](https://docs.aws.amazon.com/general/latest/gr/aws_tagging.html)
* Azure
  * [Naming rules and restrictions for Azure resources](https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules)
  * [Use tags to organize your Azure resources and management hierarchy](https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/tag-resources#limitations)
* GCP
  * [Labeling resources](https://cloud.google.com/compute/docs/labeling-resources)

### Providers

* Datadog
  *  [Defining Tags](https://docs.datadoghq.com/tagging/#defining-tags)