get_card_comments

Retrieve all comments from a specific Trello card

SERVERTrello SOURCE@delorenj/mcp-server-trello

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/io-github-delorenj-mcp-server-trello/get-card-comments.md

WHAT IT DOES

What get_card_comments does on Trello

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

RISK

Why get_card_comments is rated Low

This tool queries and returns existing data (comments on a card) without side effects. It matches the Read category definition: retrieves or queries data with no side effects. The severity is low because commenting on Trello cards is typically low-sensitivity metadata, and retrieving comments poses minimal risk even if an AI agent misuses access.

From the tool's definition "Retrieve all comments from a specific Trello card" — the verb 'Retrieve' and the read-only nature of fetching comments indicate no data modification or execution of external operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

get_card_comments Allowed

get_card_comments 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": {
    "get_card_comments": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Trello, apply this rule, and every get_card_comments call is checked against it from then on.

FAQ

Questions about get_card_comments

What does the get_card_comments tool do? +

Retrieve all comments from a specific Trello 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_comments? +

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

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

Can I rate-limit get_card_comments? +

Yes. Add a rate_limit block to the get_card_comments 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_comments completely? +

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

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

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