update_promo_code

A write tool on the Mailchimp MCP server.

SERVERMailchimp MCP SOURCEdamientilman/mailchimp-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/damientilman-mailchimp-mcp-server/update-promo-code.md

WHAT IT DOES

What update_promo_code does on Mailchimp MCP

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

RISK

Why update_promo_code is rated Medium

The tool modifies or updates promotional code records, which is a Write operation (reversible data modification). Severity is medium because promo code updates could affect marketing campaigns and customer pricing, but there is no evidence the tool executes payments or irreversibly deletes data.

From the tool's definition Tool name 'update_promo_code' combined with context of Mailchimp MCP server (marketing/email platform managing campaigns and audiences) indicates modification of promotional code data. No destructive or financial transaction execution implied by name alone.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_promo_code safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mailchimp MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_promo_code, this is the rule to start with:

update_promo_code Rate-limited

update_promo_code 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": {
    "update_promo_code": {
      "limits": [
        {
          "counter": "update_promo_code_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mailchimp MCP, apply this rule, and every update_promo_code call is checked against it from then on.

FAQ

Questions about update_promo_code

What does the update_promo_code tool do? +

update_promo_code is a write tool on the Mailchimp MCP server. It is categorised as a Write tool in the Mailchimp MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_promo_code? +

Register the Mailchimp MCP server in PolicyLayer and add a rule for update_promo_code: 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 Mailchimp MCP. Nothing to install.

What risk level is update_promo_code? +

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

Can I rate-limit update_promo_code? +

Yes. Add a rate_limit block to the update_promo_code 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 update_promo_code completely? +

Set action: deny in the PolicyLayer policy for update_promo_code. 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 update_promo_code? +

update_promo_code is provided by the Mailchimp MCP server (damientilman/mailchimp-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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