TRELLO_ADD_LISTS_CARDS_BY_ID_LIST

Creates a new card in a Trello list, which must be specified by an existing and accessible idList.

SERVERTrello SOURCEmcp-server-trello

Medium RISK CLASS

Category Write

Parameters 60 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trello/trello-add-lists-cards-by-id-list.md

WHAT IT DOES

What TRELLO_ADD_LISTS_CARDS_BY_ID_LIST does on Trello

AI agents use TRELLO_ADD_LISTS_CARDS_BY_ID_LIST 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
`due`	string	—	The due date for the new card, in ISO 8601 format (e.g., 'YYYY-MM-DDTHH:MM:SS.SSSZ') or null if no due date is set.
`desc`	string	—	The description for the new card. A string with a length from 0 to 16384 characters.
`name`	string	—	The name for the new card. A string with a length from 1 to 16384 characters. While optional, providing a name is highly recommended.
`idList`	string	—	The ID of the Trello list where the new card will be created.
`labels`	string	—	A comma-separated list of label colors to apply to the card. Valid colors: blue, green, orange, purple, red, yellow. Alternatively, 'all' can be used to apply a
`idMembers`	string	—	A comma-separated list of member IDs (24-character hex strings) to assign to the new card.

Parameters from the server's own tool schema.

RISK

Why TRELLO_ADD_LISTS_CARDS_BY_ID_LIST is rated Medium

This tool creates new data (cards) in Trello lists, which is a write operation. It is reversible since cards can be deleted. The severity is medium because an AI agent could spam or clutter boards with unwanted cards, but the impact is limited to a single Trello workspace and the action is undoable. It does not delete data, execute arbitrary code, or commit financial transactions.

From the tool's definition Tool name contains 'ADD' and description states 'Creates a new card in a Trello list', which is a reversible creation operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs TRELLO_ADD_LISTS_CARDS_BY_ID_LIST 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_LISTS_CARDS_BY_ID_LIST, this is the rule to start with:

TRELLO_ADD_LISTS_CARDS_BY_ID_LIST Rate-limited

TRELLO_ADD_LISTS_CARDS_BY_ID_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "TRELLO_ADD_LISTS_CARDS_BY_ID_LIST": {
      "limits": [
        {
          "counter": "trello_add_lists_cards_by_id_list_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_LISTS_CARDS_BY_ID_LIST call is checked against it from then on.

FAQ

Questions about TRELLO_ADD_LISTS_CARDS_BY_ID_LIST

What does the TRELLO_ADD_LISTS_CARDS_BY_ID_LIST tool do? +

Creates a new card in a Trello list, which must be specified by an existing and accessible idList. 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_LISTS_CARDS_BY_ID_LIST accept? +

TRELLO_ADD_LISTS_CARDS_BY_ID_LIST accepts 6 parameters: due, desc, name, idList, labels, idMembers. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on TRELLO_ADD_LISTS_CARDS_BY_ID_LIST? +

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

What risk level is TRELLO_ADD_LISTS_CARDS_BY_ID_LIST? +

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

Can I rate-limit TRELLO_ADD_LISTS_CARDS_BY_ID_LIST? +

Yes. Add a rate_limit block to the TRELLO_ADD_LISTS_CARDS_BY_ID_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_ADD_LISTS_CARDS_BY_ID_LIST completely? +

Set action: deny in the PolicyLayer policy for TRELLO_ADD_LISTS_CARDS_BY_ID_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_ADD_LISTS_CARDS_BY_ID_LIST? +

TRELLO_ADD_LISTS_CARDS_BY_ID_LIST 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.

KEEP EXPLORING

More on Trello, and thousands of servers like it.

This server

All 200 Trello tools →

Across the catalogue

add-tag on Kanban MCP Server →kb_add on Persistent Kb →add_video on Mcptube Vision → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →