rename_paragraph · Narrarium MCP: Risk & Policy

WHAT IT DOES

What rename_paragraph does on Narrarium

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

WHY IT NEEDS A POLICY

Why rename_paragraph needs a policy

This tool creates or modifies metadata and file structures within the book repository. While it involves file movement and renaming, these are reversible operations that do not delete data or cause irreversible damage. The blast radius is moderate—incorrect renaming could corrupt cross-references or asset organization within the repository, but changes can be undone.

From the tool's definition The tool 'rename_paragraph' performs operations that modify and reorganize data: 'Rename a paragraph or scene title or number, move its markdown file, and move any matching paragraph asset folder if present.' These are reversible write operations (renaming…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_paragraph Rate-limited

rename_paragraph 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": {
    "rename_paragraph": {
      "limits": [
        {
          "counter": "rename_paragraph_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 Narrarium, so you can run agents against it safely.

FAQ

Questions about rename_paragraph

What does the rename_paragraph tool do? +

Rename a paragraph or scene title or number, move its markdown file, and move any matching paragraph asset folder if present. It is categorised as a Write tool in the Narrarium MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rename_paragraph? +

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

What risk level is rename_paragraph? +

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

Can I rate-limit rename_paragraph? +

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

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

rename_paragraph is provided by the Narrarium MCP server (narrarium-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.