custom_create_email2 · Marketo MCP Server MCP: Risk & Policy

WHAT IT DOES

What custom_create_email2 does on Marketo MCP Server

AI agents use custom_create_email2 to create or update resources in Marketo MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Marketo MCP Server environment.

WHY IT NEEDS A POLICY

Why custom_create_email2 needs a policy

The tool creates or modifies email assets in Marketo, which is a reversible operation (emails can be edited or deleted). While the description is absent (lowering confidence slightly), the tool name and server context make it clear this performs data creation rather than deletion or execution of campaigns.

From the tool's definition Tool name 'custom_create_email2' indicates email creation functionality. Description is empty, but context from sibling tools (approve_email_program, browse_emails, create_program, create_smart_campaign) confirms this server manages Marketo marketing assets.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

custom_create_email2 Rate-limited

custom_create_email2 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": {
    "custom_create_email2": {
      "limits": [
        {
          "counter": "custom_create_email2_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 Marketo MCP Server, so you can run agents against it safely.

FAQ

Questions about custom_create_email2

What does the custom_create_email2 tool do? +

custom_create_email2. It is categorised as a Write tool in the Marketo 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 custom_create_email2? +

Register the Marketo MCP Server MCP server in PolicyLayer and add a rule for custom_create_email2: 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 Marketo MCP Server. Nothing to install.

What risk level is custom_create_email2? +

custom_create_email2 is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit custom_create_email2? +

Yes. Add a rate_limit block to the custom_create_email2 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 custom_create_email2 completely? +

Set action: deny in the PolicyLayer policy for custom_create_email2. 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 custom_create_email2? +

custom_create_email2 is provided by the Marketo MCP Server MCP server (tyron-pretorius/marketo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.