list_all_objects

THE RISK

Low Risk

Why list_all_objects needs a policy

This tool retrieves and enumerates metadata about available CRM entities. It is a read-only operation that queries the schema/structure of the system without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an agent could learn the system structure but cannot alter or access confidential data through this call alone.

From the tool's definition Tool name 'list_all_objects' and description 'List all objects (entities) available in Twenty CRM with their metadata' explicitly indicates data retrieval with no modification or deletion.

Documented attack patterns abuse exactly the kind of access list_all_objects gives an agent:

POLICY

How to control list_all_objects

PolicyLayer is an MCP gateway — it sits between your AI agents and Twenty MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_all_objects:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_all_objects": {}
  }
}

list_all_objects is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Twenty MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Twenty MCP Server tools

Write transfer_contact_to_company Transfer a contact (person) from one company to another Write link_opportunity_to_company Link an opportunity to a company and/or point of contact Write create_comment Create a comment on any CRM record Write create_company Create a new company in Twenty CRM Write create_contact Create a new contact (person) in Twenty CRM Write create_note Create a new note in Twenty CRM Write create_opportunity Create a new opportunity/deal in Twenty CRM Write create_task Create a new task in Twenty CRM

All 29 Twenty MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_all_objects

What does the list_all_objects tool do? +

List all objects (entities) available in Twenty CRM with their metadata. It is categorised as a Read tool in the Twenty MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_all_objects? +

Register the Twenty MCP Server MCP server in PolicyLayer and add a rule for list_all_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 Twenty MCP Server. Nothing to install.

What risk level is list_all_objects? +

list_all_objects is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_all_objects? +

Yes. Add a rate_limit block to the list_all_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 list_all_objects completely? +

Set action: deny in the PolicyLayer policy for list_all_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 list_all_objects? +

list_all_objects is provided by the Twenty MCP Server MCP server (jezweb/twenty-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Twenty MCP Server tool call.

Start from Twenty MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →