update_campaign

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-campaign.md

WHAT IT DOES

What update_campaign does on Mailchimp MCP

AI agents use update_campaign 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_campaign is rated Medium

Updating a campaign modifies marketing content and configuration that affects email delivery to subscribers. This is reversible (Write category) rather than destructive, but carries high severity due to potential to alter campaigns affecting thousands of recipients, change targeting, or modify message content before send.

From the tool's definition Tool name 'update_campaign' indicates modification of campaign data. Sibling tools on the server include 'create_campaign' and 'cancel_send', establishing this as a write/modification context for email marketing campaigns.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_campaign 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_campaign, this is the rule to start with:

update_campaign Rate-limited

update_campaign 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_campaign": {
      "limits": [
        {
          "counter": "update_campaign_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_campaign call is checked against it from then on.

FAQ

Questions about update_campaign

What does the update_campaign tool do? +

update_campaign 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_campaign? +

Register the Mailchimp MCP server in PolicyLayer and add a rule for update_campaign: 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_campaign? +

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

Can I rate-limit update_campaign? +

Yes. Add a rate_limit block to the update_campaign 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_campaign completely? +

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

update_campaign 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

More on Mailchimp, and thousands of servers like it.

This server

All 227 Mailchimp tools →

Across the catalogue

aroflo_create_or_update_record on AroFlo MCP →team_manager_update_budget on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →