sources_enable · Claude Role Library MCP: Risk & Policy

WHAT IT DOES

What sources_enable does on Claude Role Library

AI agents use sources_enable 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 sources_enable needs a policy

This tool modifies system configuration by enabling a prompt source, which changes what data inputs are active. This is a Write-category action because it creates/modifies state reversibly (sources can be disabled again).

From the tool's definition The tool name 'sources_enable' and description 'Enable a prompt source' indicate modification of configuration state. Enabling a source creates or activates a new data input, which is a reversible write operation on the system's prompt sources.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sources_enable Rate-limited

sources_enable 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": {
    "sources_enable": {
      "limits": [
        {
          "counter": "sources_enable_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 sources_enable

What does the sources_enable tool do? +

Enable a prompt source. 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 sources_enable? +

Register the Claude Role Library MCP server in PolicyLayer and add a rule for sources_enable: 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 sources_enable? +

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

Can I rate-limit sources_enable? +

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

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

sources_enable 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.