delete_comment

THE RISK

Critical Risk

Why delete_comment needs a policy

The tool permanently removes comments, which cannot be undone and represents data loss. This is a destructive operation affecting user-generated content on a public page. While the blast radius is somewhat limited to individual comments (not the entire page), the irreversible nature and potential for misuse (e.g., an agent deleting legitimate user comments in bulk or inappropriate contexts) justifies 'high' severity.

From the tool's definition Tool name 'delete_comment' and description 'Delete a specific comment from the Page' explicitly indicate irreversible deletion of user-generated content.

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

POLICY

How to control delete_comment

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

policy.json

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

delete_comment 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 Just Facebook MCP Server — 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 Just Facebook MCP Server tools

Destructive delete_comment_from_post Alias to delete a comment on a post. Destructive delete_post Delete a specific post from the Facebook Page. Write post_image_to_facebook Post an image with a caption to the Facebook page. Write post_to_facebook Create a new Facebook Page post with a text message. Write reply_to_comment Reply to a specific comment on a Facebook post. Write schedule_post Schedule a new post for future publishing. Write send_dm_to_user Send a direct message to a user. Write update_post Updates an existing post's message.

All 30 Just Facebook MCP Server 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 Just Facebook MCP Server → 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 delete_comment

What does the delete_comment tool do? +

Delete a specific comment from the Page. It is categorised as a Destructive tool in the Just Facebook MCP Server 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 delete_comment? +

Register the Just Facebook MCP Server MCP server in PolicyLayer and add a rule for delete_comment: 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 Just Facebook MCP Server. Nothing to install.

What risk level is delete_comment? +

delete_comment 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 delete_comment? +

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

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

delete_comment is provided by the Just Facebook MCP Server MCP server (livia-zaharia/just_facebook_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Just Facebook MCP Server tool call.

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

CHECK YOUR STACK →