paper · Tome MCP: Risk & Policy

WHAT IT DOES

What paper does on Tome

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

WHY IT NEEDS A POLICY

Why paper needs a policy

An AI agent can call paper faster than any human can review — one bad instruction and it creates or modifies resources in Tome by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

paper Rate-limited

paper 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": {
    "paper": {
      "limits": [
        {
          "counter": "paper_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 Tome, so you can run agents against it safely.

FAQ

Questions about paper

What does the paper tool do? +

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

How do I enforce a policy on paper? +

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

What risk level is paper? +

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

Can I rate-limit paper? +

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

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

paper is provided by the Tome MCP server (retospect/tome-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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