remove_attachment

THE RISK

Critical Risk

Why remove_attachment needs a policy

This tool permanently removes files from issue attachments without the ability to undo the action. While the blast radius is somewhat limited to attachments associated with a specific issue (reducing severity from critical to high), the irreversible nature of deletion categorizes it as Destructive rather than Write.

From the tool's definition Tool description explicitly states it 'Deletes a named file' from attachments, which is an irreversible operation. The term 'Deletes' combined with file removal from issue attachments indicates data destruction.

Documented attack patterns abuse exactly the kind of access remove_attachment gives an agent:

POLICY

How to control remove_attachment

PolicyLayer is an MCP gateway — it sits between your AI agents and Task Trellis MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for remove_attachment:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "remove_attachment"
  ]
}

remove_attachment disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Task Trellis MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Task Trellis MCP tools

Destructive delete_issue Deletes an issue from the task trellis system Use this tool to permanently remove issues Destructive delete_project_file Deletes a named file from the project Write add_attachment Copies a file into the managed attachments folder for a Trellis issue. Errors if the issu Write append_issue_log Appends content to an issue Write append_modified_files Appends modified files information to a trellis issue in the task trellis system Use this Write claim_task Claims a task in the task trellis system Use this tool to assign yourself to available ta Write create_issue Creates a new issue in the task trellis system Use this tool to create new issues such as Write update_issue Updates an existing issue in the task trellis system Use this tool to modify properties o

All 16 Task Trellis MCP tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Task Trellis MCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about remove_attachment

What does the remove_attachment tool do? +

Deletes a named file from the managed attachments folder for a Trellis issue. Errors if the issue does not exist or the named file does not exist. It is categorised as a Destructive tool in the Task Trellis MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on remove_attachment? +

Register the Task Trellis MCP server in PolicyLayer and add a rule for remove_attachment: 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 Task Trellis MCP. Nothing to install.

What risk level is remove_attachment? +

remove_attachment is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit remove_attachment? +

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

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

remove_attachment is provided by the Task Trellis MCP server (langadventurellc/task-trellis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Task Trellis MCP tool call.

Start from Task Trellis MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →