Method: iamPolicies.lintPolicy

Lints, or validates, an IAM policy. Currently checks the google.iam.v1.Binding.condition field, which contains a condition expression for a role binding.

Successful calls to this method always return an HTTP 200 OK status code, even if the linter detects an issue in the IAM policy.

HTTP request


The URL uses gRPC Transcoding syntax.

Request body

The request body contains data with the following structure:

JSON representation
  "fullResourceName": string,

  // Union field lint_object can be only one of the following:
  "condition": {
    object (Expr)
  // End of list of possible types for union field lint_object.


The full resource name of the policy this lint request is about.

The name follows the Google Cloud format for full resource names. For example, a Google Cloud project with ID my-project will be named //

The resource name is not used to read a policy from IAM. Only the data in the request object is linted.

Union field lint_object. Required. The IAM object to be linted. lint_object can be only one of the following:

object (Expr)

google.iam.v1.Binding.condition object to be linted.

Response body

The response of a lint operation. An empty response indicates the operation was able to fully execute and no lint issue was found.

If successful, the response body contains data with the following structure:

JSON representation
  "lintResults": [
      object (LintResult)

object (LintResult)

List of lint results sorted by severity in descending order.

Authorization scopes

Requires one of the following OAuth scopes:


For more information, see the Authentication Overview.


Structured response of a single validation unit.

JSON representation
  "level": enum (Level),
  "validationUnitName": string,
  "severity": enum (Severity),
  "fieldName": string,
  "locationOffset": integer,
  "debugMessage": string

enum (Level)

The validation unit level.



The validation unit name, for instance "lintValidationUnits/ConditionComplexityCheck".


enum (Severity)

The validation unit severity.



The name of the field for which this lint result is about.

For nested messages fieldName consists of names of the embedded fields separated by period character. The top-level qualifier is the input object to lint in the request. For example, the fieldName value condition.expression identifies a lint result for the expression field of the provided condition.



0-based character position of problematic construct within the object identified by fieldName. Currently, this is populated only for condition expression.



Human readable debug message associated with the issue.


Possible Level values of a validation unit corresponding to its domain of discourse.

LEVEL_UNSPECIFIED Level is unspecified.
CONDITION A validation unit which operates on an individual condition within a binding.


Possible Severity values of an issued result.

SEVERITY_UNSPECIFIED Severity is unspecified.
ERROR A validation unit returns an error only for critical issues. If an attempt is made to set the problematic policy without rectifying the critical issue, it causes the setPolicy operation to fail.

Any issue which is severe enough but does not cause an error. For example, suspicious constructs in the input object will not necessarily fail setPolicy, but there is a high likelihood that they won't behave as expected during policy evaluation in checkPolicy. This includes the following common scenarios:

  • Unsatisfiable condition: Expired timestamp in date/time condition.
  • Ineffective condition: Condition on a <principal, role> pair which is granted unconditionally in another binding of the same policy.
NOTICE Reserved for the issues that are not severe as ERROR/WARNING, but need special handling. For instance, messages about skipped validation units are issued as NOTICE.
INFO Any informative statement which is not severe enough to raise ERROR/WARNING/NOTICE, like auto-correction recommendations on the input content. Note that current version of the linter does not utilize INFO.
DEPRECATED Deprecated severity level.