duplicate_graph · Mnemosyne MCP: Risk & Policy

WHAT IT DOES

What duplicate_graph does on Mnemosyne MCP

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

WHY IT NEEDS A POLICY

Why duplicate_graph needs a policy

The name 'duplicate_graph' strongly suggests copying/cloning an existing graph, which is a Write operation (creating new data reversibly). However, since the description is empty, there is uncertainty — it could potentially involve overwriting. Confidence is lowered due to the lack of description.

From the tool's definition Tool name: 'duplicate_graph'; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

duplicate_graph Rate-limited

duplicate_graph 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": {
    "duplicate_graph": {
      "limits": [
        {
          "counter": "duplicate_graph_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 Mnemosyne MCP, so you can run agents against it safely.

FAQ

Questions about duplicate_graph

What does the duplicate_graph tool do? +

duplicate_graph. It is categorised as a Write tool in the Mnemosyne MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on duplicate_graph? +

Register the Mnemosyne MCP server in PolicyLayer and add a rule for duplicate_graph: 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 Mnemosyne MCP. Nothing to install.

What risk level is duplicate_graph? +

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

Can I rate-limit duplicate_graph? +

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

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

duplicate_graph is provided by the Mnemosyne MCP server (sophia-labs/mnemosyne-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.