create_cards

A write tool on the Trello MCP server.

SERVERTrello MCP Server SOURCEabdwyer/trellomcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/abdwyer-trellomcp/create-cards.md

WHAT IT DOES

What create_cards does on Trello MCP Server

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

RISK

Why create_cards is rated Medium

Creating cards is a Write operation—it creates new data in Trello that can be modified or deleted later. While not destructive, bulk card creation could clutter boards and require cleanup, posing a medium severity risk if an agent misuses parameters. Confidence is slightly reduced due to the tool's empty description, but the name and context from sibling tools and server capabilities are clear.

From the tool's definition Tool name 'create_cards' and server description stating 'supports full CRUD operations' and 'create_card' as a sibling tool. The tool creates new cards in Trello, which are reversible modifications to board state.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_cards safely

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

create_cards Rate-limited

create_cards 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": {
    "create_cards": {
      "limits": [
        {
          "counter": "create_cards_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 MCP Server, apply this rule, and every create_cards call is checked against it from then on.

FAQ

Questions about create_cards

What does the create_cards tool do? +

create_cards is a write tool on the Trello MCP Server MCP server. It is categorised as a Write tool in the Trello MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_cards? +

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

What risk level is create_cards? +

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

Can I rate-limit create_cards? +

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

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

create_cards is provided by the Trello MCP Server MCP server (abdwyer/trellomcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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