import_character_file · DM20 Protocol MCP: Risk & Policy

WHAT IT DOES

What import_character_file does on DM20 Protocol

AI agents use import_character_file to create or update resources in DM20 Protocol — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DM20 Protocol environment.

WHY IT NEEDS A POLICY

Why import_character_file needs a policy

Importing a character file would create or modify character data in the system, which is a reversible write operation. The tool lacks a description, lowering confidence slightly. Severity is medium because while importing could corrupt game state if malicious files are provided, the impact is typically limited to a single campaign/character sheet rather than system-wide or financial harm.

From the tool's definition Tool name 'import_character_file' indicates importing/uploading character data. Context of sibling tools like 'add_item_to_character', 'add_spell', 'apply_effect', and 'approve_sheet_change' suggests data modification operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

import_character_file Rate-limited

import_character_file 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": {
    "import_character_file": {
      "limits": [
        {
          "counter": "import_character_file_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 DM20 Protocol, so you can run agents against it safely.

FAQ

Questions about import_character_file

What does the import_character_file tool do? +

import_character_file. It is categorised as a Write tool in the DM20 Protocol MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on import_character_file? +

Register the DM20 Protocol MCP server in PolicyLayer and add a rule for import_character_file: 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 DM20 Protocol. Nothing to install.

What risk level is import_character_file? +

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

Can I rate-limit import_character_file? +

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

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

import_character_file is provided by the DM20 Protocol MCP server (polloinfilzato/dm20-protocol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.