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Agent skill

Implementing GCP Organization Policy Constraints

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run…

Apache-2.0Auto-check passedDevOps & Cloud

Install Implementing GCP Organization Policy Constraints

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-gcp-organization-policy-constraints -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills implementing-gcp-organization-policy-constraints --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/implementing-gcp-organization-policy-constraints .claude/skills/implementing-gcp-organization-policy-constraints && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
implementing-gcp-organization-policy-constraints
GitHub stars
34k
Token cost
~1.8k tokens
SKILL.md length
336 words
Files
8 (incl. scripts, references, assets)
Skills in repo
644
Repo updated
First seen
Licence
Apache-2.0

At a glance

Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run…

  • Works in 3 steps: List Constraints: Allow or deny specific… → Boolean Constraints: Enable or disable a… → Custom Constraints: User-defined rules…
  • Enforcing security guardrails across an orgs resource hierarchy
  • SKILL.md covers Overview, When to Use, Prerequisites and Core Concepts, plus 7 more sections
  • Runs Python scripts from its folder; calls gcloud

What it does

Implementing GCP Organization Policy Constraints is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run testing of policy impact before enforcement. Use when enforcing security guardrails across an org's resource hierarchy, or hardening GCP config at the org, folder, or project level.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 10 other files, including scripts, reference files and assets (for example `assets/template.md`, `references/api-reference.md` and `references/standards.md`).

It sits in DevOps & Cloud, covering Infrastructure as code. It works with Google Cloud and Terraform. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.

When your agent uses it

  • Enforcing security guardrails across an orgs resource hierarchy
  • Hardening GCP config at the org

Example prompts

  • “Use the implementing-gcp-organization-policy-constraints skill to implement GCP Organization Policy constraints via gcloud and Terraform, such as…”
  • “/implementing-gcp-organization-policy-constraints”

Requirements

  • Python 3

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. List Constraints: Allow or deny specific values (e.g., allowed regions)
  2. Boolean Constraints: Enable or disable a capability (e.g., disable serial port access)
  3. Custom Constraints: User-defined rules targeting specific resource fields (Preview)

What it can do on your machine

Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • gcloud

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • docs.google.com
    • cloud.google.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Implementing GCP Organization Policy Constraints loads about 1.8k tokens when it runs, and up to ~3k if it reads all its reference files. Until then it costs about 106 tokens; SKILL.md has 336 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~106
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 336 words, ~1,789 tokens.

Download SKILL.mdSave it as .claude/skills/implementing-gcp-organization-policy-constraints/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.
name
implementing-gcp-organization-policy-constraints
description
Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run testing of policy impact before enforcement. Use when enforcing security guardrails across an org's resource hierarchy, or hardening GCP config at the org, folder, or project level.
domain
cybersecurity
subdomain
cloud-security
tags
gcp, organization-policy, constraints, governance, compliance, cloud-security, resource-manager
version
1.0
author
mahipal
license
Apache-2.0
nist_csf
PR.IR-01, ID.AM-08, GV.SC-06, DE.CM-01
mitre_attack
T1078.004, T1530, T1537, T1580

Implementing GCP Organization Policy Constraints

Overview

The GCP Organization Policy Service provides centralized and programmatic control over cloud resources. Organization policies configure constraints that restrict one or more Google Cloud services, enforced at organization, folder, or project levels. They improve security by blocking external IPs, requiring encryption, and minimizing unauthorized access. Changes can take up to 15 minutes to propagate.

When to Use

  • When deploying or configuring implementing gcp organization policy constraints capabilities in your environment
  • When establishing security controls aligned to compliance requirements
  • When building or improving security architecture for this domain
  • When conducting security assessments that require this implementation

Prerequisites

  • GCP Organization with Organization Administrator role
  • gcloud CLI configured and authenticated
  • Terraform or gcloud for policy management
  • Organization Policy Administrator IAM role (roles/orgpolicy.policyAdmin)

Core Concepts

Constraint Types
  1. List Constraints: Allow or deny specific values (e.g., allowed regions)
  2. Boolean Constraints: Enable or disable a capability (e.g., disable serial port access)
  3. Custom Constraints: User-defined rules targeting specific resource fields (Preview)
Policy Inheritance

Policies inherit from the lowest ancestor with an enforced policy. If no ancestor has a policy, Google's managed default behavior applies.

Essential Security Constraints

Restrict VM External IP Addresses
bash
# Deny external IP addresses on all VMs
gcloud resource-manager org-policies set-policy \
  --organization=ORGANIZATION_ID \
  policy.yaml

policy.yaml:

yaml
constraint: constraints/compute.vmExternalIpAccess
listPolicy:
  allValues: DENY
Restrict Resource Locations
bash
gcloud org-policies set-policy \
  --organization=ORGANIZATION_ID \
  location-policy.yaml

location-policy.yaml:

yaml
constraint: constraints/gcp.resourceLocations
listPolicy:
  allowedValues:
    - "in:us-locations"
    - "in:eu-locations"
Disable Default Service Account Creation
yaml
constraint: constraints/iam.automaticIamGrantsForDefaultServiceAccounts
booleanPolicy:
  enforced: true
Require OS Login for SSH
yaml
constraint: constraints/compute.requireOsLogin
booleanPolicy:
  enforced: true
Disable Serial Port Access
yaml
constraint: constraints/compute.disableSerialPortAccess
booleanPolicy:
  enforced: true
Enforce Uniform Bucket-Level Access
yaml
constraint: constraints/storage.uniformBucketLevelAccess
booleanPolicy:
  enforced: true
Restrict Public IP on Cloud SQL
yaml
constraint: constraints/sql.restrictPublicIp
booleanPolicy:
  enforced: true
Disable Service Account Key Creation
yaml
constraint: constraints/iam.disableServiceAccountKeyCreation
booleanPolicy:
  enforced: true

Terraform Implementation

hcl
resource "google_organization_policy" "restrict_vm_external_ip" {
  org_id     = var.org_id
  constraint = "constraints/compute.vmExternalIpAccess"

  list_policy {
    deny {
      all = true
    }
  }
}

resource "google_organization_policy" "restrict_locations" {
  org_id     = var.org_id
  constraint = "constraints/gcp.resourceLocations"

  list_policy {
    allow {
      values = ["in:us-locations", "in:eu-locations"]
    }
  }
}

resource "google_organization_policy" "require_os_login" {
  org_id     = var.org_id
  constraint = "constraints/compute.requireOsLogin"

  boolean_policy {
    enforced = true
  }
}

resource "google_folder_organization_policy" "dev_folder_external_ip" {
  folder     = google_folder.dev.name
  constraint = "constraints/compute.vmExternalIpAccess"

  list_policy {
    allow {
      values = ["projects/dev-project/zones/us-central1-a/instances/bastion-host"]
    }
  }
}

Dry-Run Testing

Use Policy Intelligence tools to test changes before enforcement:

bash
# Create a dry-run policy to monitor impact
gcloud org-policies set-policy \
  --organization=ORGANIZATION_ID \
  dry-run-policy.yaml

dry-run-policy.yaml:

yaml
constraint: constraints/compute.vmExternalIpAccess
listPolicy:
  allValues: DENY
dryRunSpec: true
bash
# Check violations against dry-run policy
gcloud org-policies list-custom-constraints \
  --organization=ORGANIZATION_ID

Custom Constraints

yaml
# custom-constraint.yaml
name: organizations/ORGANIZATION_ID/customConstraints/custom.disableGKEAutoUpgrade
resourceTypes:
  - container.googleapis.com/NodePool
methodTypes:
  - CREATE
  - UPDATE
condition: "resource.management.autoUpgrade == true"
actionType: DENY
displayName: Deny GKE auto-upgrade on node pools
description: Prevents enabling auto-upgrade on GKE node pools for controlled upgrades
bash
gcloud org-policies set-custom-constraint custom-constraint.yaml

Monitoring and Compliance

List active policies
bash
gcloud org-policies list --organization=ORGANIZATION_ID
Describe a specific policy
bash
gcloud org-policies describe constraints/compute.vmExternalIpAccess \
  --organization=ORGANIZATION_ID
Audit policy violations with Cloud Asset Inventory
bash
gcloud asset search-all-resources \
  --scope=organizations/ORGANIZATION_ID \
  --query="policy:constraints/compute.vmExternalIpAccess"
ConstraintTypeScopePurpose
compute.vmExternalIpAccessList/DenyOrgPrevent public VM IPs
gcp.resourceLocationsList/AllowOrgRestrict to approved regions
iam.disableServiceAccountKeyCreationBooleanOrgForce Workload Identity
compute.requireOsLoginBooleanOrgMandate OS Login for SSH
storage.uniformBucketLevelAccessBooleanOrgEnforce uniform bucket access
sql.restrictPublicIpBooleanOrgNo public Cloud SQL
compute.disableSerialPortAccessBooleanOrgDisable serial port
compute.disableNestedVirtualizationBooleanOrgNo nested VMs

References

© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 7 other files (scripts, references, assets) in skills/implementing-gcp-organization-policy-constraints of mukul975/Anthropic-Cybersecurity-Skills.

  • SKILL.md
  • LICENSE
  • assets/template.md
  • references/api-reference.md
  • references/standards.md
  • references/workflows.md
  • scripts/agent.py
  • scripts/process.py

Open the folder on GitHubat commit 54a7988

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Works with

Categories

Questions about Implementing GCP Organization Policy Constraints

What does Implementing GCP Organization Policy Constraints do?

Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run…. Implementing GCP Organization Policy Constraints is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Implements GCP Organization Policy constraints via gcloud and Terraform, such as restricting external IPs, resource locations, default service accounts, and service account keys, plus dry-run testing of policy impact before enforcement.

When should I use Implementing GCP Organization Policy Constraints?

Implementing GCP Organization Policy Constraints fits situations like: enforcing security guardrails across an orgs resource hierarchy; hardening GCP config at the org.

How do I install Implementing GCP Organization Policy Constraints in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-gcp-organization-policy-constraints -a claude-code`. Or copy the skill folder (skills/implementing-gcp-organization-policy-constraints in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/implementing-gcp-organization-policy-constraints in your project. Claude Code loads it when a task matches its description.

How do I install Implementing GCP Organization Policy Constraints in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-gcp-organization-policy-constraints -a codex`. Or copy the skill folder (skills/implementing-gcp-organization-policy-constraints in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/implementing-gcp-organization-policy-constraints in your project. Codex loads it when a task matches its description.

Can I use Implementing GCP Organization Policy Constraints in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill implementing-gcp-organization-policy-constraints -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/implementing-gcp-organization-policy-constraints, .gemini/skills/implementing-gcp-organization-policy-constraints, .github/skills/implementing-gcp-organization-policy-constraints and .opencode/skills/implementing-gcp-organization-policy-constraints in your project.

What does Implementing GCP Organization Policy Constraints need to run?

Going by SKILL.md and its folder, Implementing GCP Organization Policy Constraints needs Python for the scripts in its folder and the command-line tools its instructions call (gcloud). Our summary lists: Python 3.

Does Implementing GCP Organization Policy Constraints access the network?

SKILL.md names 2 domains. As links in the text: docs.google.com and cloud.google.com. This is read from the text; nothing was executed.

Is Implementing GCP Organization Policy Constraints safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Implementing GCP Organization Policy Constraints use?

Implementing GCP Organization Policy Constraints is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Implementing GCP Organization Policy Constraints use?

About 1.8k tokens (SKILL.md is roughly 7.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.2k tokens, read only when the agent opens those files.

What are the alternatives to Implementing GCP Organization Policy Constraints?

Skills that share tags, products or a category with Implementing GCP Organization Policy Constraints: Senior DevOps Toolkit (maslennikov-ig/claude-code-orchestrator-kit, 260 stars), Terravision Cloud Diagrams (patrickchugh/terravision, 1.6k stars), Terrashark (LukasNiessen/terrashark, 716 stars) and Provider Verification (mondoohq/mql, 412 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Implementing GCP Organization Policy Constraints?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 34,116 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.

Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.