custom_sync_custom_objects

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

SERVERMarketo MCP Server SOURCEtyron-pretorius/marketo-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/tyron-pretorius-marketo-mcp/custom-sync-custom-objects.md

WHAT IT DOES

What custom_sync_custom_objects does on Marketo MCP Server

AI agents invoke custom_sync_custom_objects to trigger actions in Marketo MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why custom_sync_custom_objects is rated High

The tool name 'custom_sync_custom_objects' combined with the description 'Calls the Marketo REST API directly' indicates this tool executes direct API calls to synchronize (upsert/create/update) custom objects in Marketo. 'Sync' in Marketo API context typically means an upsert operation. Since it operates directly and can modify data, it falls under Execute (direct API execution with side effects).

From the tool's definition 'Calls the Marketo REST API directly' — a custom sync operation against Marketo's custom objects endpoint implies writing/upserting data via direct API calls with arbitrary parameters

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs custom_sync_custom_objects 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_sync_custom_objects, this is the rule to start with:

custom_sync_custom_objects Rate-limited

custom_sync_custom_objects stays usable, but rate-capped: a runaway agent can't fire it dozens of times 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_sync_custom_objects": {
      "limits": [
        {
          "counter": "custom_sync_custom_objects_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT 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_sync_custom_objects call is checked against it from then on.

FAQ

Questions about custom_sync_custom_objects

What does the custom_sync_custom_objects tool do? +

[CUSTOM] Calls the Marketo REST API directly (not Adobe's native MCP). It is categorised as a Execute tool in the Marketo MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on custom_sync_custom_objects? +

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

custom_sync_custom_objects is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit custom_sync_custom_objects? +

Yes. Add a rate_limit block to the custom_sync_custom_objects 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_sync_custom_objects completely? +

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

custom_sync_custom_objects 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.

KEEP EXPLORING

More on Marketo MCP Server, and thousands of servers like it.

This server

All 298 Marketo MCP Server tools → High-risk tools on this server →

Across the catalogue

All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →