custom_delete_custom_object_type_fields

[CUSTOM] Calls the Marketo REST API directly (not Adobe's native MCP).

SERVERMarketo MCP Server SOURCEtyron-pretorius/marketo-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/tyron-pretorius-marketo-mcp/custom-delete-custom-object-type-fields.md

WHAT IT DOES

What custom_delete_custom_object_type_fields does on Marketo MCP Server

AI agents call custom_delete_custom_object_type_fields to permanently remove resources in Marketo MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why custom_delete_custom_object_type_fields is rated Critical

The 'delete' action is inherently destructive and irreversible. Deleting custom object type fields in a marketing automation system like Marketo will permanently remove those field definitions and associated data, affecting campaigns, leads, and program configurations that depend on those fields. This cannot be easily undone and has high blast radius if triggered incorrectly by an AI agent.

From the tool's definition Tool name contains 'delete' and 'fields', indicating irreversible removal of custom object type field definitions. Description states it 'Calls the Marketo REST API directly,' which is a pass-through for API operations that modify Marketo data structures.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs custom_delete_custom_object_type_fields safely

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

custom_delete_custom_object_type_fields Hidden

custom_delete_custom_object_type_fields is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "custom_delete_custom_object_type_fields"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about custom_delete_custom_object_type_fields

What does the custom_delete_custom_object_type_fields tool do? +

[CUSTOM] Calls the Marketo REST API directly (not Adobe's native MCP). It is categorised as a Destructive tool in the Marketo MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on custom_delete_custom_object_type_fields? +

Register the Marketo MCP Server MCP server in PolicyLayer and add a rule for custom_delete_custom_object_type_fields: 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_delete_custom_object_type_fields? +

custom_delete_custom_object_type_fields is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit custom_delete_custom_object_type_fields? +

Yes. Add a rate_limit block to the custom_delete_custom_object_type_fields 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_delete_custom_object_type_fields completely? +

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

custom_delete_custom_object_type_fields 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.

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