roles_import · Claude Role Library MCP: Risk & Policy

WHAT IT DOES

What roles_import does on Claude Role Library

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

WHY IT NEEDS A POLICY

Why roles_import needs a policy

This tool fetches content from an external URL and writes it into the local role library. It creates new data (a role entry) in the local storage, which is a Write operation. The severity is medium because it pulls external content that could introduce malicious prompts or personas, but the operation is reversible (the role can be removed with roles_remove).

From the tool's definition Import a role from a URL (GitHub, raw URL, etc.)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

roles_import Rate-limited

roles_import 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": {
    "roles_import": {
      "limits": [
        {
          "counter": "roles_import_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 Claude Role Library, so you can run agents against it safely.

FAQ

Questions about roles_import

What does the roles_import tool do? +

Import a role from a URL (GitHub, raw URL, etc.). It is categorised as a Write tool in the Claude Role Library MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on roles_import? +

Register the Claude Role Library MCP server in PolicyLayer and add a rule for roles_import: 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 Claude Role Library. Nothing to install.

What risk level is roles_import? +

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

Can I rate-limit roles_import? +

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

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

roles_import is provided by the Claude Role Library MCP server (tony427/claude-role-library). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.