update_last_editor · MCP Memory Server MCP: Risk & Policy

WHAT IT DOES

What update_last_editor does on MCP Memory Server

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

WHY IT NEEDS A POLICY

Why update_last_editor needs a policy

This tool creates or modifies metadata within a file—specifically the @last-editor field—which is a reversible change typical of Write operations. While it modifies files, it does not execute code, delete data irreversibly, or move money.

From the tool's definition Tool performs 'Update @last-editor field in a file', which modifies file metadata reversibly. The description explicitly states it updates a field (Write operation) rather than deleting or executing external commands.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_last_editor Rate-limited

update_last_editor 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": {
    "update_last_editor": {
      "limits": [
        {
          "counter": "update_last_editor_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 MCP Memory Server, so you can run agents against it safely.

FAQ

Questions about update_last_editor

What does the update_last_editor tool do? +

Update @last-editor field in a file with Git author information. It is categorised as a Write tool in the MCP Memory 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 update_last_editor? +

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

What risk level is update_last_editor? +

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

Can I rate-limit update_last_editor? +

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

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

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