Restore a previously saved session snapshot to current page.
AI agents invoke restore_session_state to trigger actions in JS Reverse Strong MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Restoring a session state to the current page triggers external browser operations that overwrite the current runtime environment. This is not a simple read; it actively mutates the browser page state. While it could be considered Write, it executes a browser action that changes runtime context, making Execute the most appropriate category.
From the tool's definition 'Restore a previously saved session snapshot to current page' — actively modifies the browser's current page state by applying a saved snapshot
Documented attack patterns abuse exactly the kind of access restore_session_state gives an agent:
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 restore_session_state:
{
"version": "1",
"default": "deny",
"tools": {
"restore_session_state": {
"limits": [
{
"counter": "restore_session_state_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}restore_session_state stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Restore a previously saved session snapshot to current page. It is categorised as a Execute tool in the JS Reverse Strong MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the JS Reverse Strong MCP server in PolicyLayer and add a rule for restore_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.
restore_session_state is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the restore_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 restore_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.
restore_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.
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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85 JS Reverse Strong MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.