restore_memories · Memory MCP Server MCP: Risk & Policy

WHAT IT DOES

What restore_memories does on Memory MCP Server

AI agents use restore_memories to create or update resources in Memory MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Memory MCP Server environment.

WHY IT NEEDS A POLICY

Why restore_memories needs a policy

This tool performs a reversible write operation that modifies memory state. While it overwrites data, the operation itself is not destructive in the irreversible sense—the previous memories may still exist elsewhere and the action can be undone by restoring to a different backup.

From the tool's definition Tool description states it 'will overwrite all memories of the current conversation' (覆蓋當前對話的所有記憶). The restore operation modifies existing memory state by replacing current memories with backup data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

restore_memories Rate-limited

restore_memories 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Memory MCP Server, so you can run agents against it safely.

FAQ

Questions about restore_memories

What does the restore_memories tool do? +

從備份文件還原記憶。警告：這將覆蓋當前對話的所有記憶。. It is categorised as a Write tool in the 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_memories? +

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

What risk level is restore_memories? +

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

Can I rate-limit restore_memories? +

Yes. Add a rate_limit block to the restore_memories 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_memories completely? +

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

restore_memories is provided by the Memory MCP Server MCP server (win10ogod/memory-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.