delete_essence_msg

Delete essence message

SERVERNapCat MCP Server SOURCE1021143806/napcat_mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

WHAT IT DOES

What delete_essence_msg does on NapCat MCP Server

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

RISK

Why delete_essence_msg is rated Critical

This tool irreversibly removes data (essence-marked messages) from a group, which cannot be undone. Deletion is the hallmark of the Destructive category. While the blast radius is confined to group communication rather than financial or system-level impact, unauthorized deletion of important group messages constitutes high-severity data loss.

From the tool's definition Tool name 'delete_essence_msg' explicitly uses 'delete' verb paired with 'essence message' — a permanent removal operation. Essence messages are curated important messages in QQ groups that cannot be recovered once deleted.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete_essence_msg safely

PolicyLayer is an MCP gateway: it sits between your AI agents and NapCat MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete_essence_msg, this is the rule to start with:

delete_essence_msg Hidden

delete_essence_msg is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

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

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect NapCat MCP Server, apply this rule, and every delete_essence_msg call is checked against it from then on.

FAQ

Questions about delete_essence_msg

What does the delete_essence_msg tool do? +

Delete essence message. It is categorised as a Destructive tool in the NapCat 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_essence_msg? +

Register the NapCat MCP Server MCP server in PolicyLayer and add a rule for delete_essence_msg: 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 NapCat MCP Server. Nothing to install.

What risk level is delete_essence_msg? +

delete_essence_msg 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_essence_msg? +

Yes. Add a rate_limit block to the delete_essence_msg 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_essence_msg completely? +

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

delete_essence_msg is provided by the NapCat MCP Server MCP server (1021143806/napcat_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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