attach_image_to_card

What attach_image_to_card does on Trello

AI agents use attach_image_to_card 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.

Why attach_image_to_card is rated Medium

This tool creates a new attachment on a card, which is a reversible modification of data. It does not execute arbitrary code, delete data, or move money. While it modifies state on a Trello board, the attachment can be removed, making it a Write-category operation. Severity is medium because an agent could spam attachments or attach inappropriate content, but the damage is limited and reversible.

From the tool's definition Tool name 'attach_image_to_card' and description 'Attach an image to a card from a URL on a specific board' indicate the tool modifies a Trello card by adding an attachment. This is a create/modify operation that adds data to an existing card.

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

{
  "version": "1",
  "default": "deny",
  "tools": {
    "attach_image_to_card": {
      "limits": [
        {
          "counter": "attach_image_to_card_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

Questions about attach_image_to_card