crow_shiori_delete

THE RISK

Critical Risk

Why crow_shiori_delete needs a policy

This tool permanently deletes bookmark records and associated cached content without the ability to recover them. Deletion operations that cannot be undone are classified as Destructive. The high severity reflects the risk that an AI agent could inadvertently or maliciously remove user bookmarks and their cached versions, resulting in loss of saved references and data.

From the tool's definition Tool description explicitly states 'Delete a bookmark from Shiori' and emphasizes 'This is permanent and removes any cached content.' The use of 'permanent' and 'delete' combined with removal of cached content indicates irreversible data loss.

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

POLICY

How to control crow_shiori_delete

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 crow_shiori_delete:

policy.json

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

crow_shiori_delete 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 →

Free to start. No card required.

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 crow_shiori_delete

What does the crow_shiori_delete tool do? +

Delete a bookmark from Shiori. This is permanent and removes any cached content. 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 crow_shiori_delete? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_shiori_delete: 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 crow_shiori_delete? +

crow_shiori_delete 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 crow_shiori_delete? +

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

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

crow_shiori_delete 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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