restore_memory_version

THE RISK

Medium Risk

Why restore_memory_version needs a policy

While restoration can be reversible (preview mode suggests non-destructive testing), the core function modifies data by overwriting current state with historical versions.

From the tool's definition Tool performs 'restore_memory_version' which recovers memory to a previous version, supporting full/selective/preview modes. The description in Korean indicates restoration (복구) of memories to prior states.

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

POLICY

How to control restore_memory_version

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "restore_memory_version": {
      "limits": [
        {
          "counter": "restore_memory_version_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

restore_memory_version stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Work Memory 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.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

More Work Memory MCP Server tools

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Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about restore_memory_version

What does the restore_memory_version tool do? +

이전 버전으로 메모리를 복구합니다. 전체/선택적/미리보기 모드 지원. It is categorised as a Write tool in the Work Memory MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on restore_memory_version? +

Register the Work Memory MCP Server MCP server in PolicyLayer and add a rule for restore_memory_version: 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 Work Memory MCP Server. Nothing to install.

What risk level is restore_memory_version? +

restore_memory_version is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit restore_memory_version? +

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

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

restore_memory_version is provided by the Work Memory MCP Server MCP server (moontmsai/work-memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Work Memory MCP Server tool call.

Start from Work Memory 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 →