get_card_labels

THE RISK

Low Risk

Why get_card_labels needs a policy

This tool queries and returns label information from an existing card without creating, modifying, deleting, or executing any operations. It is a straightforward read-only data retrieval function typical of Read category tools.

From the tool's definition Tool description explicitly states 'Get all labels on a card' and 'to see the labels applied to a card' — retrieval operations with no modification or side effects.

Documented attack patterns abuse exactly the kind of access get_card_labels gives an agent:

POLICY

How to control get_card_labels

PolicyLayer is an MCP gateway — it sits between your AI agents and Trello, and nothing reaches the server without passing your rules. This is the rule we recommend for get_card_labels:

policy.json

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

get_card_labels is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Trello — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Trello tools

Destructive delete_attachment Delete an attachment from a card. Use this tool to remove a file or link from a card. Destructive delete_board Permanently delete a board. Use this tool with caution as deletion cannot be undone. Destructive delete_card Permanently delete a card. Use this tool with caution as deletion cannot be undone. Destructive delete_checkitem Delete a checkitem from a checklist. Use this tool to remove an item from a checklist. Destructive delete_checklist Delete a checklist. Use this tool to remove a checklist from a card. Destructive delete_label Permanently delete a label. Use this tool with caution as deletion cannot be undone. Destructive close_board Close (archive) a board. Use this tool to archive a board without deleting it. Write remove_label Remove a label from a card. Use this tool to update the categorization of a card.

All 76 Trello tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_card_labels

What does the get_card_labels tool do? +

Get all labels on a card. Use this tool to see the labels applied to a card. It is categorised as a Read tool in the Trello MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_card_labels? +

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

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

Can I rate-limit get_card_labels? +

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

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

get_card_labels is provided by the Trello MCP server (v4lheru/trello-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Trello tool call.

Start from Trello, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →