list_cards

Get all cards in a Trello list.

SERVERTrello MCP Server SOURCEabdwyer/trellomcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What list_cards does on Trello MCP Server

AI agents call list_cards to retrieve information from Trello MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_cards is rated Low

This tool retrieves and queries card data from a Trello list without creating, modifying, deleting, or executing any operations. It has no side effects and presents minimal risk even if called by an AI agent with arbitrary parameters.

From the tool's definition Tool name is 'list_cards' and description states 'Get all cards in a Trello list.' The verb 'Get' and 'list' indicate a retrieval operation with no modification of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_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 list_cards, this is the rule to start with:

list_cards Allowed

list_cards is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_cards": {}
  }
}

ALLOW ONLY 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 list_cards call is checked against it from then on.

FAQ

Questions about list_cards

What does the list_cards tool do? +

Get all cards in a Trello list. It is categorised as a Read tool in the Trello MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_cards? +

Register the Trello MCP Server MCP server in PolicyLayer and add a rule for list_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 list_cards? +

list_cards is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_cards? +

Yes. Add a rate_limit block to the list_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 list_cards completely? +

Set action: deny in the PolicyLayer policy for list_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 list_cards? +

list_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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