# attach_image_data_to_card

Attach an image to a card from base64 data or data URL (for screenshot uploads)

Agent View of the PolicyLayer registry record for `attach_image_data_to_card`. HTML page: https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/attach-image-data-to-card

## Facts

- Tool: `attach_image_data_to_card`
- Server: Trello (`@delorenj/mcp-server-trello`) — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello.md
- Install: `npx -y @delorenj/mcp-server-trello`
- Homepage: https://github.com/delorenj/mcp-server-trello
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "attach_image_data_to_card",
    "arguments": {}
  }
}
```

## Why attach_image_data_to_card is rated Medium

This tool modifies a Trello card by adding an image attachment to it. The operation is reversible (the attachment can be removed later), and has no external side effects beyond the Trello workspace. It falls clearly into the Write category.

From the tool's own definition: "The tool name is 'attach_image_data_to_card' and the description states it will 'Attach an image to a card from base64 data or data URL', which creates or adds new data (an image attachment) to an existing Trello card. This is a modification operation."

## Use case

AI agents use attach_image_data_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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Trello:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "attach_image_data_to_card": {
      "limits": [
        {
          "counter": "attach_image_data_to_card_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Trello (49)

- `archive_list` — Destructive — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/archive-list.md
- `delete_checklist_item` — Destructive — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/delete-checklist-item.md
- `delete_comment` — Destructive — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/delete-comment.md
- `delete_label` — Destructive — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/delete-label.md
- `download_attachment` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/download-attachment.md
- `find_checklist_items_by_description` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/find-checklist-items-by-description.md
- `get_acceptance_criteria` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-acceptance-criteria.md
- `get_active_board_info` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-active-board-info.md
- `get_board_custom_fields` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-board-custom-fields.md
- `get_board_labels` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-board-labels.md
- `get_board_members` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-board-members.md
- `get_card` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-card.md
- `get_card_comments` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-card-comments.md
- `get_card_history` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-card-history.md
- `get_cards_by_list_id` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-cards-by-list-id.md
- `get_checklist_by_name` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-checklist-by-name.md
- `get_checklist_items` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-checklist-items.md
- `get_lists` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-lists.md
- `get_my_cards` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-my-cards.md
- `get_recent_activity` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/get-recent-activity.md
- `list_boards` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/list-boards.md
- `list_boards_in_workspace` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/list-boards-in-workspace.md
- `list_workspaces` — Read — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/list-workspaces.md
- `add_card_to_list` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/add-card-to-list.md
- `add_cards_to_list` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/add-cards-to-list.md
- `add_checklist_item` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/add-checklist-item.md
- `add_comment` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/add-comment.md
- `add_list_to_board` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/add-list-to-board.md
- `archive_card` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/archive-card.md
- `assign_member_to_card` — Write — https://policylayer.com/tools/io-github-delorenj-mcp-server-trello/assign-member-to-card.md
- …and 19 more: https://policylayer.com/tools/io-github-delorenj-mcp-server-trello.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-delorenj-mcp-server-trello · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-delorenj-mcp-server-trello