bulk_update_characters · DM20 Protocol MCP: Risk & Policy

WHAT IT DOES

What bulk_update_characters does on DM20 Protocol

AI agents use bulk_update_characters 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 bulk_update_characters needs a policy

The 'bulk_update_characters' tool performs reversible modifications to character data (Write category). Severity is high because bulk operations can affect multiple character records simultaneously, creating significant blast radius if an AI agent misuses it (e.g., corrupting stats for multiple characters).

From the tool's definition Tool name 'bulk_update_characters' indicates bulk modification of character data. Description is empty, limiting certainty.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bulk_update_characters Rate-limited

bulk_update_characters 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": {
    "bulk_update_characters": {
      "limits": [
        {
          "counter": "bulk_update_characters_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 bulk_update_characters

What does the bulk_update_characters tool do? +

bulk_update_characters. 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 bulk_update_characters? +

Register the DM20 Protocol MCP server in PolicyLayer and add a rule for bulk_update_characters: 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 bulk_update_characters? +

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

Can I rate-limit bulk_update_characters? +

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

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

bulk_update_characters 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.