create_corp_rule · Fastly NGWAF MCP Server MCP

WHAT IT DOES

What create_corp_rule does on Fastly NGWAF MCP Server

AI agents use create_corp_rule to create or update resources in Fastly NGWAF MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fastly NGWAF MCP Server environment.

WHY IT NEEDS A POLICY

Why create_corp_rule needs a policy

This tool creates new WAF rules at the corporation level, which affects security policy across an entire organization. While reversible (rules can be deleted), misuse could weaken security posture, disable protections, or create unintended security gaps. Categorized as Write rather than Execute because it modifies configuration/policy data rather than triggering external operations.

From the tool's definition Tool name is 'create_corp_rule' with description 'Create a corporation-level rule'. The 'create' verb indicates data creation/modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_corp_rule Rate-limited

create_corp_rule stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_corp_rule": {
      "limits": [
        {
          "counter": "create_corp_rule_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Fastly NGWAF MCP Server, so you can run agents against it safely.

FAQ

Questions about create_corp_rule

What does the create_corp_rule tool do? +

Create a corporation-level rule. It is categorised as a Write tool in the Fastly NGWAF MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_corp_rule? +

Register the Fastly NGWAF MCP Server MCP server in PolicyLayer and add a rule for create_corp_rule: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Fastly NGWAF MCP Server. Nothing to install.

What risk level is create_corp_rule? +

create_corp_rule is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_corp_rule? +

Yes. Add a rate_limit block to the create_corp_rule rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_corp_rule completely? +

Set action: deny in the PolicyLayer policy for create_corp_rule. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_corp_rule? +

create_corp_rule is provided by the Fastly NGWAF MCP Server MCP server (purpleax/fastlymcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.