trello_create_list

THE RISK

Medium Risk

Why trello_create_list needs a policy

This tool creates new data (a list in a board) which is reversible—lists can be deleted or archived by authorized users. It does not execute arbitrary code, move money, or irreversibly destroy data. The blast radius is low because creating a list is a standard collaborative action in project management tools with minimal negative consequences if invoked unexpectedly.

From the tool's definition Tool name 'trello_create_list' and description 'Create a new list in a Trello board' explicitly indicates creation of new data structures (lists/workflow columns) without deletion or irreversible destruction.

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

POLICY

How to control trello_create_list

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "trello_create_list": {
      "limits": [
        {
          "counter": "trello_create_list_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

trello_create_list 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.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Trello Desktop MCP tools

Write create_card Create a new card in a Trello list. Use this to add tasks, ideas, or items to your workflo Write move_card Move a card to a different list. Use this to change a card\ Write trello_add_comment Add a comment to a Trello card. Use this to add notes, updates, or discussions to cards. Write update_card Update properties of an existing Trello card. Use this to change card details like name, d Read get_board_details Get detailed information about a specific Trello board, including its lists and cards. Use Read get_card Get detailed information about a specific Trello card, including its content, status, memb Read get_lists Get all lists in a specific Trello board. Use this to see the workflow columns (like Read list_boards List all Trello boards accessible to the user. Use this to see all boards you have access

All 19 Trello Desktop MCP tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about trello_create_list

What does the trello_create_list tool do? +

Create a new list in a Trello board. Use this to add workflow columns like. It is categorised as a Write tool in the Trello Desktop 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 trello_create_list? +

Register the Trello Desktop MCP server in PolicyLayer and add a rule for trello_create_list: 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 Trello Desktop MCP. Nothing to install.

What risk level is trello_create_list? +

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

Can I rate-limit trello_create_list? +

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

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

trello_create_list is provided by the Trello Desktop MCP server (kocakli/trello-desktop-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Trello Desktop MCP tool call.

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

CHECK YOUR STACK →