<p>Assigns a set of tags to an Amazon Cognito user pool. A tag is a label that you can use to categorize and manage user pools in different ways, such as by purpose, owner, environment, or other criteria.</p> <p>Each tag consists of a key and value, both of which you define. A key is a general category for more specific values. For example, if you have two versions of a user pool, one for testing and another for production, you might assign an <code>Environment</code> tag key to both user pools. The value of this key might be <code>Test</code> for one user pool, and <code>Production</code> for the other.</p> <p>Tags are useful for cost tracking and access control. You can activate your tags so that they appear on the Billing and Cost Management console, where you can track the costs associated with your user pools. In an Identity and Access Management policy, you can constrain permissions for user pools based on specific tags or tag values.</p> <p>You can use this action up to 5 times per second, per account. A user pool can have as many as 50 tags.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}