enforce_retention

THE RISK

Critical Risk

Why enforce_retention needs a policy

The tool explicitly deletes sessions based on age criteria. Deletion of data is irreversible by nature, and a misconfigured retention policy (e.g., wrong number of days) could permanently destroy large amounts of session data. This is a bulk destructive operation with a high blast radius.

From the tool's definition "Apply data retention policy by deleting sessions older than specified days"

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

POLICY

How to control enforce_retention

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

policy.json

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

enforce_retention 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 Claude Code Toolkit — 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 Claude Code Toolkit → 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 enforce_retention

What does the enforce_retention tool do? +

Apply data retention policy by deleting sessions older than specified days. It is categorised as a Destructive tool in the Claude Code Toolkit 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 enforce_retention? +

Register the Claude Code Toolkit MCP server in PolicyLayer and add a rule for enforce_retention: 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 Claude Code Toolkit. Nothing to install.

What risk level is enforce_retention? +

enforce_retention 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 enforce_retention? +

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

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

enforce_retention is provided by the Claude Code Toolkit MCP server (asifkibria/claude-code-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Code Toolkit tool call.

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

CHECK YOUR STACK →