wiki_save · Loenn MCP: Risk & Policy

WHAT IT DOES

What wiki_save does on Loenn

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

WHY IT NEEDS A POLICY

Why wiki_save needs a policy

The 'wiki_save' name combined with sibling tools that create/modify map content (add_*) strongly suggests this saves or persists changes to map data. The empty description reduces confidence, but in context of an editor MCP for .bin files, 'save' operations are Write (reversible modifications).

From the tool's definition Tool named 'wiki_save' with empty description; context indicates server handles Celeste map file editing with tools like add_decal, add_entity, add_room, add_trigger suggesting Write operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wiki_save Rate-limited

wiki_save 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": {
    "wiki_save": {
      "limits": [
        {
          "counter": "wiki_save_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 Loenn, so you can run agents against it safely.

FAQ

Questions about wiki_save

What does the wiki_save tool do? +

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

How do I enforce a policy on wiki_save? +

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

What risk level is wiki_save? +

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

Can I rate-limit wiki_save? +

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

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

wiki_save is provided by the Loenn MCP server (magedeline/loenn-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.