skill_trash_user_skill

THE RISK

Critical Risk

Why skill_trash_user_skill needs a policy

The word 'trash' in the tool name implies deletion or moving to trash, which is typically a destructive or at least write operation. Given no description is available, I'm relying on the naming convention where 'trash' commonly means soft-delete or move to trash bin. Rated high severity since it could irreversibly remove skill data.

From the tool's definition Tool name contains 'trash' which strongly implies moving to trash/deletion, and 'user_skill' suggests it operates on user skill data

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

POLICY

How to control skill_trash_user_skill

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

policy.json

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

skill_trash_user_skill 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 ClaudeSkills 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 ClaudeSkills MCP Server tools

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All 13 ClaudeSkills MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in ClaudeSkills 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 skill_trash_user_skill

What does the skill_trash_user_skill tool do? +

skill_trash_user_skill. It is categorised as a Destructive tool in the ClaudeSkills 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 skill_trash_user_skill? +

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

What risk level is skill_trash_user_skill? +

skill_trash_user_skill 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 skill_trash_user_skill? +

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

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

skill_trash_user_skill is provided by the ClaudeSkills MCP Server MCP server (tsoernes/skills-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ClaudeSkills MCP Server tool call.

Start from ClaudeSkills 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 →