knowledge_archive · Loom MCP: Risk & Policy

WHAT IT DOES

What knowledge_archive does on Loom

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

WHY IT NEEDS A POLICY

Why knowledge_archive needs a policy

This tool modifies data (knowledge page status) but does so reversibly. 'Soft-retire' implies the archival is not destructive — the page is not deleted, only marked inactive. An agent could archive critical memory pages erroneously, disrupting agent cognition and continuity, but the action can be undone (e.g., by un-archiving).

From the tool's definition 'Soft-retire a knowledge page: set its status to archived with an optional tombstone note' — modifies the status field of a knowledge page to 'archived' and optionally adds metadata (tombstone note).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

knowledge_archive Rate-limited

knowledge_archive 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": {
    "knowledge_archive": {
      "limits": [
        {
          "counter": "knowledge_archive_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 Loom, so you can run agents against it safely.

FAQ

Questions about knowledge_archive

What does the knowledge_archive tool do? +

Soft-retire a knowledge page: set its status to archived with an optional tombstone note. It is categorised as a Write tool in the Loom MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on knowledge_archive? +

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

What risk level is knowledge_archive? +

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

Can I rate-limit knowledge_archive? +

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

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

knowledge_archive is provided by the Loom MCP server (jbarket/loom). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.