disable_library_source · DM20 Protocol MCP: Risk & Policy

WHAT IT DOES

What disable_library_source does on DM20 Protocol

AI agents use disable_library_source 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 disable_library_source needs a policy

This tool modifies campaign settings by disabling a library source, which is a reversible write operation. It does not retrieve data (Read), execute arbitrary code or external operations (Execute), irreversibly delete data (Destructive), or involve financial transactions (Financial).

From the tool's definition Tool name 'disable_library_source' and description 'Disable a library source for the current campaign' indicate modification of campaign configuration state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disable_library_source Rate-limited

disable_library_source 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": {
    "disable_library_source": {
      "limits": [
        {
          "counter": "disable_library_source_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 disable_library_source

What does the disable_library_source tool do? +

Disable a library source for the current campaign. 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 disable_library_source? +

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

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

Can I rate-limit disable_library_source? +

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

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

disable_library_source 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.