wf_delete_post

THE RISK

Critical Risk

Why wf_delete_post needs a policy

This tool irreversibly deletes data (a post) from the local instance. While federated copies may persist on remote servers, the action on the local instance cannot be undone, making it a classic Destructive operation. The high severity reflects the blast radius of an AI agent accidentally or maliciously deleting user content without recovery options on the primary instance.

From the tool's definition Tool name 'wf_delete_post' and description explicitly states 'Permanently delete a post' and 'Destructive — the post is gone from the local instance'.

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

POLICY

How to control wf_delete_post

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

policy.json

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

wf_delete_post 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 Crow — 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 →

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EXPLORE

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Go deeper

Critical-risk tools in Crow → 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 wf_delete_post

What does the wf_delete_post tool do? +

Permanently delete a post. Destructive — the post is gone from the local instance; federated copies on remote servers may persist. It is categorised as a Destructive tool in the Crow 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 wf_delete_post? +

Register the Crow MCP server in PolicyLayer and add a rule for wf_delete_post: 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 Crow. Nothing to install.

What risk level is wf_delete_post? +

wf_delete_post 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 wf_delete_post? +

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

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

wf_delete_post is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

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

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