Manage in-memory session snapshots: save, restore, list, delete, dump, or load.
AI agents call session_state to permanently remove resources in JS Reverse MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The tool includes 'delete' operations on session snapshots, which is irreversible. It also includes 'restore' and 'load' which could overwrite current session state. The most severe applicable category is Destructive due to the delete and overwrite capabilities.
From the tool's definition Manage in-memory session snapshots: save, restore, list, delete, dump, or load.
Attacks that exploit this kind of access
Manage in-memory session snapshots: save, restore, list, delete, dump, or load. It is categorised as a Destructive tool in the JS Reverse MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the JS Reverse MCP server in PolicyLayer and add a rule for 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 MCP. Nothing to install.
session_state is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the 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.
Set action: deny in the PolicyLayer policy for 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.
session_state is provided by the JS Reverse MCP server (noone-hub/jsreverser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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