List cards on a Trello board or within a specific list. You can filter by board or by list. At least one of board_id or list_id must be provided. Args: - board_id (string, optional): Board ID to get all cards from - list_id (string, optional): List ID to get cards from a specific list - filter (
AI agents call trello_list_cards to retrieve information from Trello MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward read-only operation that retrieves and lists card information. It does not create, modify, delete, or execute any actions. No side effects occur from calling this tool. The blast radius of misuse is minimal—an agent could retrieve unwanted card information but cannot damage, alter, or delete Trello data.
From the tool's definition Tool name 'trello_list_cards' and description 'List cards on a Trello board or within a specific list' indicates data retrieval with no modification or side effects. The filtering parameters (board_id, list_id) are purely for querying existing data.
Attacks that exploit this kind of access
List cards on a Trello board or within a specific list. You can filter by board or by list. At least one of board_id or list_id must be provided. Args: - board_id (string, optional): Board ID to get all cards from - list_id (string, optional): List ID to get cards from a specific list - filter (. It is categorised as a Read tool in the Trello MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Trello MCP Server MCP server in PolicyLayer and add a rule for trello_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.
trello_list_cards is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the trello_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.
Set action: deny in the PolicyLayer policy for trello_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.
trello_list_cards is provided by the Trello MCP Server MCP server (rdeprey/trello-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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