EvaluationResult

Contains the results of a simulation.

This data type is used by the return parameter of SimulateCustomPolicy and SimulatePrincipalPolicy.

Important

The simulator now returns a single EvaluationResult per action, regardless of how many resource ARNs are provided. Previously, simulating one action against N resources returned N evaluation results, each containing the same aggregate decision. The top-level fields (EvalDecision, MatchedStatements, MissingContextValues, EvalDecisionDetails) now represent the aggregate decision across all requested resources. The top-level EvalDecision reflects the most restrictive decision across all resources (for example, if any resource produces explicitDeny, the top-level decision is explicitDeny).

To see the decision for each individual resource, use ResourceSpecificResults. If your application parses evaluation results per resource ARN, update your code to read per-resource decisions from ResourceSpecificResults rather than from the top-level result.

EvalActionName

The name of the API operation tested on the indicated resource.

Type: String

Length Constraints: Minimum length of 3. Maximum length of 128.

Required: Yes

EvalDecision

The result of the simulation.

Type: String

Valid Values: allowed | explicitDeny | implicitDeny

Required: Yes

EvalDecisionDetails

EvalDecisionDetails.entry.N.key (key)

EvalDecisionDetails.entry.N.value (value)

Additional details about the results of the cross-account evaluation decision. This parameter is populated for only cross-account simulations. It contains a brief summary of how each policy type contributes to the final evaluation decision.

In the top-level result, this map reports the most restrictive decision per policy type across all requested resources.

If the simulation evaluates policies within the same account and includes a resource ARN, then the parameter is present but the response is empty. If the simulation evaluates policies within the same account and specifies all resources (*), then the parameter is not returned.

When you make a cross-account request, AWS evaluates the request in the trusting account and the trusted account. The request is allowed only if both evaluations return true. For more information about how policies are evaluated, see Evaluating policies within a single account.

If an AWS Organizations SCP included in the evaluation denies access, the simulation ends. In this case, policy evaluation does not proceed any further and this parameter is not returned.

Type: String to string map

Key Length Constraints: Minimum length of 3. Maximum length of 256.

Valid Values: allowed | explicitDeny | implicitDeny

Required: No

EvalResourceName

The ARN template for the simulated resource type (for example, arn:${Partition}:s3:::${BucketName}/${KeyName}), or * if no ARN format is defined for the action. This is not a specific customer-provided resource ARN. To find the decision for a specific resource, use ResourceSpecificResults.

Note

If you previously relied on EvalResourceName to identify which specific resource a result applies to, you must now use the EvalResourceName field within individual entries in ResourceSpecificResults instead.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

Required: No

MatchedStatements.member.N

A list of the statements in the input policies that determine the result for this scenario. Remember that even if multiple statements allow the operation on the resource, if only one statement denies that operation, then the explicit deny overrides any allow. In addition, the deny statement is the only entry included in the result.

In the top-level result, this field contains the union of matched statements across all requested resources. Only statements that contributed to the reported decision are included. For per-resource matched statements, see ResourceSpecificResults. This field doesn't include statements from service control policies (SCPs). Only statements from identity-based and resource-based policies appear here.

Type: Array of Statement objects

Required: No

MissingContextValues.member.N

A list of context keys that are required by the included input policies but that were not provided by one of the input parameters. This list is used when the resource in a simulation is "*", either explicitly, or when the ResourceArns parameter blank. If you include a list of resources, then any missing context values are instead included under the ResourceSpecificResults section. To discover the context keys used by a set of policies, you can call GetContextKeysForCustomPolicy or GetContextKeysForPrincipalPolicy.

In the top-level result, this field contains the deduplicated set of missing context values across all requested resources. This field doesn't include context keys referenced by service control policies (SCPs). Only context keys referenced by identity-based and resource-based policies appear here.

Type: Array of strings

Length Constraints: Minimum length of 5. Maximum length of 256.

Required: No

OrganizationsDecisionDetail

A structure that details how Organizations and its service control policies affect the results of the simulation. Only applies if the simulated user's account is part of an organization.

For resources that don't support organization-level evaluation, this field is omitted from the top-level result. For per-resource details, see ResourceSpecificResults.

Type: OrganizationsDecisionDetail object

Required: No

PermissionsBoundaryDecisionDetail

Contains information about the effect that a permissions boundary has on a policy simulation when the boundary is applied to an IAM entity.

Type: PermissionsBoundaryDecisionDetail object

Required: No

ResourceSpecificResults.member.N

The individual results of the simulation of the API operation specified in EvalActionName on each resource.

Type: Array of ResourceSpecificResult objects

Required: No

EvaluationResult

Important

Contents

Note

See Also