# delete_attachment

Delete an attachment from a Trello card.

Agent View of the PolicyLayer registry record for `delete_attachment`. HTML page: https://policylayer.com/tools/abdwyer-trellomcp/delete-attachment

## Facts

- Tool: `delete_attachment`
- Server: Trello MCP Server (`abdwyer/trellomcp`) — https://policylayer.com/tools/abdwyer-trellomcp.md
- Homepage: https://github.com/abdwyer/TrelloMCP
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

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

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

## Why delete_attachment is rated Critical

This tool permanently removes an attachment from a Trello card. Deletion is an irreversible operation that cannot be undone through normal means. While the blast radius is somewhat limited compared to deleting an entire board or card, the destructive nature of permanently removing files from a user's workspace—without undo capability—makes this a Destructive category tool rather than Write.

From the tool's own definition: "Tool name 'delete_attachment' combined with description 'Delete an attachment from a Trello card' explicitly performs an irreversible deletion operation."

## Use case

AI agents call delete_attachment to permanently remove resources in Trello MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_attachment"
  ]
}
```

## Other tools on Trello MCP Server (40)

- `delete_card` — Destructive — https://policylayer.com/tools/abdwyer-trellomcp/delete-card.md
- `delete_checklist` — Destructive — https://policylayer.com/tools/abdwyer-trellomcp/delete-checklist.md
- `delete_checklist_item` — Destructive — https://policylayer.com/tools/abdwyer-trellomcp/delete-checklist-item.md
- `delete_label` — Destructive — https://policylayer.com/tools/abdwyer-trellomcp/delete-label.md
- `download_attachment` — Read — https://policylayer.com/tools/abdwyer-trellomcp/download-attachment.md
- `get_attachment` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-attachment.md
- `get_board` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-board.md
- `get_board_labels` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-board-labels.md
- `get_board_lists` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-board-lists.md
- `get_card` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-card.md
- `get_card_attachments` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-card-attachments.md
- `get_card_checklists` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-card-checklists.md
- `get_card_labels` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-card-labels.md
- `get_checklist` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-checklist.md
- `get_checklist_items` — Read — https://policylayer.com/tools/abdwyer-trellomcp/get-checklist-items.md
- `list_boards` — Read — https://policylayer.com/tools/abdwyer-trellomcp/list-boards.md
- `list_cards` — Read — https://policylayer.com/tools/abdwyer-trellomcp/list-cards.md
- `add_attachment_file` — Write — https://policylayer.com/tools/abdwyer-trellomcp/add-attachment-file.md
- `add_attachment_url` — Write — https://policylayer.com/tools/abdwyer-trellomcp/add-attachment-url.md
- `add_checklist_item` — Write — https://policylayer.com/tools/abdwyer-trellomcp/add-checklist-item.md
- `add_checklist_items` — Write — https://policylayer.com/tools/abdwyer-trellomcp/add-checklist-items.md
- `add_label_to_card` — Write — https://policylayer.com/tools/abdwyer-trellomcp/add-label-to-card.md
- `archive_list` — Write — https://policylayer.com/tools/abdwyer-trellomcp/archive-list.md
- `clear_card_due_date` — Write — https://policylayer.com/tools/abdwyer-trellomcp/clear-card-due-date.md
- `create_board` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-board.md
- `create_card` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-card.md
- `create_cards` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-cards.md
- `create_checklist` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-checklist.md
- `create_checklist_with_items` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-checklist-with-items.md
- `create_label` — Write — https://policylayer.com/tools/abdwyer-trellomcp/create-label.md
- …and 10 more: https://policylayer.com/tools/abdwyer-trellomcp.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=abdwyer-trellomcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/abdwyer-trellomcp