sync_plot · Narrarium MCP: Risk & Policy

WHAT IT DOES

What sync_plot does on Narrarium

AI agents use sync_plot 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 sync_plot needs a policy

This tool modifies a plot.md file by updating it with current information, which is a Write operation (creates or modifies data reversibly). It is not Destructive because the changes are updates/refreshes rather than irreversible deletions. Severity is medium because unintended modifications to plot tracking could corrupt narrative structure, though it remains reversible by re-running with correct data.

From the tool's definition "Refresh the root plot.md file" indicates modification of an existing file. "tracks chapter progression, revealed secrets, and timeline dates from current canon" describes updating content based on current state.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sync_plot Rate-limited

sync_plot 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": {
    "sync_plot": {
      "limits": [
        {
          "counter": "sync_plot_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 sync_plot

What does the sync_plot tool do? +

Refresh the root plot.md file so it tracks chapter progression, revealed secrets, and timeline dates from current canon. 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 sync_plot? +

Register the Narrarium MCP server in PolicyLayer and add a rule for sync_plot: 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 sync_plot? +

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

Can I rate-limit sync_plot? +

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

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

sync_plot 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.