delete_session_state

THE RISK

Critical Risk

Why delete_session_state needs a policy

The tool irreversibly removes session data stored in memory. While the impact is scoped to a single session snapshot rather than production data, deletion operations that cannot be undone are categorized as Destructive. An AI agent mistakenly deleting critical debugging session state during reverse engineering workflows could lose valuable runtime analysis data.

From the tool's definition Tool name contains 'delete' and description states 'Delete one in-memory session snapshot by sessionId.' The verb 'delete' combined with the irreversible nature of removing session state (cannot be undone without re-recording) fits the Destructive category.

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

POLICY

How to control delete_session_state

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

policy.json

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

delete_session_state 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 JS Reverse Strong MCP — 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 JS Reverse Strong MCP → 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 delete_session_state

What does the delete_session_state tool do? +

Delete one in-memory session snapshot by sessionId. It is categorised as a Destructive tool in the JS Reverse Strong MCP 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_session_state? +

Register the JS Reverse Strong MCP server in PolicyLayer and add a rule for delete_session_state: 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 JS Reverse Strong MCP. Nothing to install.

What risk level is delete_session_state? +

delete_session_state 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_session_state? +

Yes. Add a rate_limit block to the delete_session_state 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_session_state completely? +

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

delete_session_state is provided by the JS Reverse Strong MCP server (lwjjike/jsreverser-strong-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every JS Reverse Strong MCP tool call.

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

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