trello_add_label_to_card · Mtl Trello MCP: Risk & Policy

WHAT IT DOES

What trello_add_label_to_card does on Mtl Trello

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

WHY IT NEEDS A POLICY

Why trello_add_label_to_card needs a policy

This tool creates or modifies data in a reversible manner—adding a label to a card. The operation can be easily undone by removing the label. It does not execute code, delete data irreversibly, or move funds. It is a straightforward Write operation with minimal blast radius if misused, as labels are non-critical metadata and the action is fully reversible.

From the tool's definition Tool name 'trello_add_label_to_card' and description 'Attach a single label to a Trello card without affecting other labels' indicate a modification operation that adds metadata to an existing card.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

trello_add_label_to_card Rate-limited

trello_add_label_to_card 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": {
    "trello_add_label_to_card": {
      "limits": [
        {
          "counter": "trello_add_label_to_card_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mtl Trello, so you can run agents against it safely.

FAQ

Questions about trello_add_label_to_card

What does the trello_add_label_to_card tool do? +

Attach a single label to a Trello card without affecting other labels. It is categorised as a Write tool in the Mtl Trello MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on trello_add_label_to_card? +

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

What risk level is trello_add_label_to_card? +

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

Can I rate-limit trello_add_label_to_card? +

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

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

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