MCP Tools Reference: orgpolicy.googleapis.com

Tool: GetEffectivePolicy

Gets the final, evaluated policy on a resource, taking into account inheritance from parent resources and conditions. Use this to see the actual enforcement state.

The following code sample shows how to use curl to call the GetEffectivePolicy MCP tool.

Curl Request 
curl --location 'https://orgpolicy.googleapis.com/mcp' \
--header 'content-type: application/json' \
--header 'accept: application/json, text/event-stream' \
--data '{
  "method": "tools/call",
  "params": {
    "name": "GetEffectivePolicy",
    "arguments": {
      // provide these details according to the tool's MCP specification
    }
  },
  "jsonrpc": "2.0",
  "id": 1
}'

Input Schema

The request sent to the GetEffectivePolicy method.

GetEffectivePolicyRequest

JSON representation 
{
  "name": string
}
Fields
name

string

Required. The effective policy to compute. See Policy for naming requirements.

Output Schema

Defines an organization policy that is used to specify constraints for configurations of Google Cloud resources.

Policy

JSON representation 
{
  "name": string,
  "spec": {
    object (PolicySpec)
  },
  "alternate": {
    object (AlternatePolicySpec)
  },
  "dryRunSpec": {
    object (PolicySpec)
  },
  "etag": string
}
Fields
name

string

Immutable. The resource name of the policy. Must be one of the following forms, where constraint_name is the name of the constraint that this policy configures:

  • projects/{project_number}/policies/{constraint_name}
  • folders/{folder_number}/policies/{constraint_name}
  • organizations/{organization_number}/policies/{constraint_name}

For example, projects/123/policies/compute.disableSerialPortAccess.

Note: projects/{project_id}/policies/{constraint_name} is also an acceptable name for API requests, but responses will return the name using the equivalent project number.
spec

object (PolicySpec)

Basic information about the organization policy.
alternate
(deprecated)

object (AlternatePolicySpec)

Deprecated.
dryRunSpec

object (PolicySpec)

Dry-run policy. Audit-only policy, can be used to monitor how the policy would have impacted the existing and future resources if it's enforced.
etag

string

Optional. An opaque tag indicating the current state of the policy, used for concurrency control. This entity tag (ETag) is computed by the server based on the value of other fields, and may be sent on update and delete requests to ensure the client has an up-to-date value before proceeding.

PolicySpec

JSON representation 
{
  "etag": string,
  "updateTime": string,
  "rules": [
    {
      object (PolicyRule)
    }
  ],
  "inheritFromParent": boolean,
  "reset": boolean
}
Fields
etag

string

An opaque tag indicating the current version of the policySpec, used for concurrency control.

This field is ignored if used in a CreatePolicy request.

When the policy is returned from either a GetPolicy or a ListPolicies request, this entity tag (ETag) indicates the version of the current policySpec to use when executing a read-modify-write loop.

When the policy is returned from a GetEffectivePolicy request, the ETag will be unset.
updateTime

string (Timestamp format)

Output only. The time stamp this was previously updated. This represents the last time a call to CreatePolicy or UpdatePolicy was made for that policy.

Uses RFC 3339, where generated output will always be Z-normalized and use 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".
rules[]

object (PolicyRule)

In policies for boolean constraints, the following requirements apply:

  • There must be exactly one policy rule where a condition is unset.
  • Boolean policy rules with conditions must set enforced to the opposite of the policy rule without a condition.
  • During policy evaluation, policy rules with conditions that are true for a target resource take precedence.
inheritFromParent

boolean

Determines the inheritance behavior for this policy.

If inherit_from_parent is true, policy rules set higher up in the hierarchy (up to the closest root) are inherited and present in the effective policy. If it is false, then no rules are inherited, and this policy becomes the new root for evaluation. This field can be set only for policies that configure list constraints.
reset

boolean

Ignores policies set above this resource and restores the constraint_default enforcement behavior of the specific constraint at this resource. This field can be set in policies for either list or boolean constraints. If set, rules must be empty and inherit_from_parent must be set to false.

Timestamp

JSON representation 
{
  "seconds": string,
  "nanos": integer
}
Fields
seconds

string (int64 format)

Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z. Must be between -62135596800 and 253402300799 inclusive (which corresponds to 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z).
nanos

integer

Non-negative fractions of a second at nanosecond resolution. This field is the nanosecond portion of the duration, not an alternative to seconds. Negative second values with fractions must still have non-negative nanos values that count forward in time. Must be between 0 and 999,999,999 inclusive.

PolicyRule

JSON representation 
{
  "condition": {
    object (Expr)
  },
  "parameters": {
    object
  },

  // Union field kind can be only one of the following:
  "values": {
    object (StringValues)
  },
  "allowAll": boolean,
  "denyAll": boolean,
  "enforce": boolean
  // End of list of possible types for union field kind.
}
Fields
condition

object (Expr)

A condition that determines whether this rule is used to evaluate the policy.

When set, the google.type.Expr.expression field must contain 1 to 10 subexpressions, joined by the || or && operators. Each subexpression must use the resource.matchTag(), resource.matchTagId(), resource.hasTagKey(), or resource.hasTagKeyId() Common Expression Language (CEL) function.

The resource.matchTag() function takes the following arguments:

  • key_name: the namespaced name of the tag key, with the organization ID and a slash (/) as a prefix; for example, 123456789012/environment
  • value_name: the short name of the tag value

For example: resource.matchTag('123456789012/environment, 'prod')

The resource.matchTagId() function takes the following arguments:

  • key_id: the permanent ID of the tag key; for example, tagKeys/123456789012
  • value_id: the permanent ID of the tag value; for example, tagValues/567890123456

For example: resource.matchTagId('tagKeys/123456789012', 'tagValues/567890123456')

The resource.hasTagKey() function takes the following argument:

  • key_name: the namespaced name of the tag key, with the organization ID and a slash (/) as a prefix; for example, 123456789012/environment

For example: resource.hasTagKey('123456789012/environment')

The resource.hasTagKeyId() function takes the following arguments:

  • key_id: the permanent ID of the tag key; for example, tagKeys/123456789012

For example: resource.hasTagKeyId('tagKeys/123456789012')
parameters

object (Struct format)

Optional. Required for managed constraints if parameters are defined. Passes parameter values when policy enforcement is enabled. Ensure that parameter value types match those defined in the constraint definition. For example:

{
  "allowedLocations" : ["us-east1", "us-west1"],
  "allowAll" : true
}

Union field kind.

kind can be only one of the following:
values

object (StringValues)

List of values to be used for this policy rule. This field can be set only in policies for list constraints.
allowAll

boolean

Setting this to true means that all values are allowed. This field can be set only in policies for list constraints.
denyAll

boolean

Setting this to true means that all values are denied. This field can be set only in policies for list constraints.
enforce

boolean

If true, then the policy is enforced. If false, then any configuration is acceptable. This field can be set in policies for boolean constraints, custom constraints and managed constraints.

StringValues

JSON representation 
{
  "allowedValues": [
    string
  ],
  "deniedValues": [
    string
  ]
}
Fields
allowedValues[]

string

List of values allowed at this resource.
deniedValues[]

string

List of values denied at this resource.

Expr

JSON representation 
{
  "expression": string,
  "title": string,
  "description": string,
  "location": string
}
Fields
expression

string

Textual representation of an expression in Common Expression Language syntax.
title

string

Optional. Title for the expression, i.e. a short string describing its purpose. This can be used e.g. in UIs which allow to enter the expression.
description

string

Optional. Description of the expression. This is a longer text which describes the expression, e.g. when hovered over it in a UI.
location

string

Optional. String indicating the location of the expression for error reporting, e.g. a file name and a position in the file.

Struct

JSON representation 
{
  "fields": {
    string: value,
    ...
  }
}
Fields
fields

map (key: string, value: value (Value format))

Unordered map of dynamically typed values.

An object containing a list of "key": value pairs. Example: { "name": "wrench", "mass": "1.3kg", "count": "3" }.

FieldsEntry

JSON representation 
{
  "key": string,
  "value": value
}
Fields
key

string
value

value (Value format)

Value

JSON representation 
{

  // Union field kind can be only one of the following:
  "nullValue": null,
  "numberValue": number,
  "stringValue": string,
  "boolValue": boolean,
  "structValue": {
    object
  },
  "listValue": array
  // End of list of possible types for union field kind.
}
Fields
Union field kind. The kind of value. kind can be only one of the following:
nullValue

null

Represents a JSON null.
numberValue

number

Represents a JSON number. Must not be NaN, Infinity or -Infinity, since those are not supported in JSON. This also cannot represent large Int64 values, since JSON format generally does not support them in its number type.
stringValue

string

Represents a JSON string.
boolValue

boolean

Represents a JSON boolean (true or false literal in JSON).
structValue

object (Struct format)

Represents a JSON object.
listValue

array (ListValue format)

Represents a JSON array.

ListValue

JSON representation 
{
  "values": [
    value
  ]
}
Fields
values[]

value (Value format)

Repeated field of dynamically typed values.

AlternatePolicySpec

JSON representation 
{
  "launch": string,
  "spec": {
    object (PolicySpec)
  }
}
Fields
launch

string

Reference to the launch that will be used while audit logging and to control the launch. Set only in the alternate policy.
spec

object (PolicySpec)

Specify constraint for configurations of Google Cloud resources.

NullValue

Represents a JSON null.

NullValue is a sentinel, using an enum with only one value to represent the null value for the Value type union.

A field of type NullValue with any value other than 0 is considered invalid. Most ProtoJSON serializers will emit a Value with a null_value set as a JSON null regardless of the integer value, and so will round trip to a 0 value.

Enums
NULL_VALUE Null value.

Tool Annotations

Tool annotations are sent to MCP clients to describe the basic risk of a given tool. Most clients treat these hints as untrusted, but they can be used to decide when a confirmation prompt might be sent to a user.

Along with the title string, the following boolean hints are defined as follows:

  • readOnlyHint: If true, the tool doesn't modify its environment. Default: false.
  • destructiveHint: If true, then the tool can perform destructive actions. If false, then the tool can only perform additive actions. Default: true.
  • idempotentHint: If true, then calling the tool repeatedly with the same arguments will have no additional effect on its environment. Default: false.
  • openWorldHint: If true, then the tool can interact with an 'open world' of external entities. If false, then the tool can only interact with internal entities. For example, a web search tool would be open world, while a memory tool would not be open world.

Destructive Hint: ❌ | Idempotent Hint: ✅ | Read Only Hint: ✅ | Open World Hint: ❌