TRELLO_ADD_LABELS

Creates a new label with a specified name (required) and color on a Trello board (idBoard required); this action defines the label but does not apply it to cards.

SERVERTrello SOURCEmcp-server-trello

Medium RISK CLASS

Category Write

Parameters 30 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/trello/trello-add-labels.md

WHAT IT DOES

What TRELLO_ADD_LABELS does on Trello

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

Parameter	Type	Required	Description
`name`	string	—	Name for the new label (0-16384 characters). Required by the Trello API. An empty string creates a color-only visual label.
`color`	string	—	Color for the new label. Trello may assign a default color if unspecified or invalid.
`idBoard`	string	—	ID of the board for the new label. Required by the Trello API. The board must exist and be accessible.

Parameters from the server's own tool schema.

RISK

Why TRELLO_ADD_LABELS is rated Medium

Creating a label on a Trello board is a write operation that modifies board configuration reversibly. Labels can be deleted or renamed without cascading damage. The blast radius is minimal: a single unused label consumes negligible resources and does not affect existing card data. This is less severe than executing arbitrary operations or destructively removing data.

From the tool's definition Tool description states 'Creates a new label' — a creation action that modifies board state. The description explicitly notes this 'does not apply it to cards,' confirming it is reversible configuration, not destructive.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

TRELLO_ADD_LABELS Rate-limited

TRELLO_ADD_LABELS 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_LABELS": {
      "limits": [
        {
          "counter": "trello_add_labels_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about TRELLO_ADD_LABELS

What does the TRELLO_ADD_LABELS tool do? +

Creates a new label with a specified name (required) and color on a Trello board (idBoard required); this action defines the label but does not apply it to cards. It is categorised as a Write tool in the Trello MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does TRELLO_ADD_LABELS accept? +

TRELLO_ADD_LABELS accepts 3 parameters: name, color, idBoard. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on TRELLO_ADD_LABELS? +

Register the Trello MCP server in PolicyLayer and add a rule for TRELLO_ADD_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 TRELLO_ADD_LABELS? +

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

Can I rate-limit TRELLO_ADD_LABELS? +

Yes. Add a rate_limit block to the TRELLO_ADD_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 TRELLO_ADD_LABELS completely? +

Set action: deny in the PolicyLayer policy for TRELLO_ADD_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 TRELLO_ADD_LABELS? +

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

KEEP EXPLORING

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