TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD

Creates a new, empty list on a specified, existing Trello board, typically used as a column or category for organizing cards.

SERVERTrello SOURCEmcp-server-trello

Medium RISK CLASS

Category Write

Parameters 30 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trello/trello-add-boards-lists-by-id-board.md

WHAT IT DOES

What TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD does on Trello

AI agents use TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD 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 list on the board. Valid values are 'top', 'bottom', or a positive number (e.g., 1, 2.5, 3). If not provided, the list is added to the b
`name`	string	—	The name for the new list. Must be a string with a length from 1 to 16384 characters.
`idBoard`	string	—	The ID of the board to which the new list will be added.

Parameters from the server's own tool schema.

RISK

Why TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD is rated Medium

This tool creates new content (a list) on a Trello board, which is a Write operation. It is reversible (lists can be deleted or archived), so it does not qualify as Destructive. The severity is medium because while an agent could spam or clutter a board by creating many lists, the impact is confined to that board and can be easily undone by a user with board access.

From the tool's definition "Creates a new, empty list on a specified, existing Trello board" — the tool creates new data structures (lists) that are reversibly modifiable and deletable.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD 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_BOARDS_LISTS_BY_ID_BOARD, this is the rule to start with:

TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD Rate-limited

TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD 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_BOARDS_LISTS_BY_ID_BOARD": {
      "limits": [
        {
          "counter": "trello_add_boards_lists_by_id_board_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_BOARDS_LISTS_BY_ID_BOARD call is checked against it from then on.

FAQ

Questions about TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD

What does the TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD tool do? +

Creates a new, empty list on a specified, existing Trello board, typically used as a column or category for organizing cards. 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_BOARDS_LISTS_BY_ID_BOARD accept? +

TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD accepts 3 parameters: pos, name, idBoard. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD? +

Register the Trello MCP server in PolicyLayer and add a rule for TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD: 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_BOARDS_LISTS_BY_ID_BOARD? +

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

Can I rate-limit TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD? +

Yes. Add a rate_limit block to the TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD 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_BOARDS_LISTS_BY_ID_BOARD completely? +

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

TRELLO_ADD_BOARDS_LISTS_BY_ID_BOARD 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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