TRELLO_ADD_CHECKLISTS

Creates a new checklist on a Trello card, either by name or by copying from idChecklistSource, targeting an idCard or idBoard; this action creates only the checklist structure, not its items.

SERVERTrello SOURCEmcp-server-trello

Medium RISK CLASS

Category Write

Parameters 50 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trello/trello-add-checklists.md

WHAT IT DOES

What TRELLO_ADD_CHECKLISTS does on Trello

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

Parameter	Type	Required	Description
`pos`	string	—	The position of the new checklist on its card. Accepted values are 'top', 'bottom', or a positive number (integer or float).
`name`	string	—	The name for the new checklist. Required if `idChecklistSource` is not provided. Must be a string with length between 0 and 16384 characters.
`idCard`	string	—	The ID of the Trello card to which the checklist will be added. If provided, the checklist is added to this specific card. One of `idBoard` or `idCard` is requi
`idBoard`	string	—	The ID of the Trello board. If `idCard` is not specified, this board will be targeted, potentially for creating a new card to host the checklist. One of `idBoar
`idChecklistSource`	string	—	The ID of an existing checklist to be copied. If provided, the `name` parameter is ignored, and the new checklist will be a duplicate of this source.

Parameters from the server's own tool schema.

RISK

Why TRELLO_ADD_CHECKLISTS is rated Medium

This tool creates new data structures (checklists) on Trello cards, which is a reversible modification operation. It fits the Write category because it adds/creates content without permanently destroying data or executing arbitrary code.

From the tool's definition Creates a new checklist on a Trello card...this action creates only the checklist structure

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs TRELLO_ADD_CHECKLISTS safely

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

TRELLO_ADD_CHECKLISTS Rate-limited

TRELLO_ADD_CHECKLISTS 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": {
    "TRELLO_ADD_CHECKLISTS": {
      "limits": [
        {
          "counter": "trello_add_checklists_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about TRELLO_ADD_CHECKLISTS

What does the TRELLO_ADD_CHECKLISTS tool do? +

Creates a new checklist on a Trello card, either by name or by copying from idChecklistSource, targeting an idCard or idBoard; this action creates only the checklist structure, not its items. It is categorised as a Write tool in the Trello MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does TRELLO_ADD_CHECKLISTS accept? +

TRELLO_ADD_CHECKLISTS accepts 5 parameters: pos, name, idCard, idBoard, idChecklistSource. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on TRELLO_ADD_CHECKLISTS? +

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

What risk level is TRELLO_ADD_CHECKLISTS? +

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

Can I rate-limit TRELLO_ADD_CHECKLISTS? +

Yes. Add a rate_limit block to the TRELLO_ADD_CHECKLISTS 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_ADD_CHECKLISTS completely? +

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

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

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