scf_add_custom_risk_control · Scf MCP: Risk & Policy

WHAT IT DOES

What scf_add_custom_risk_control does on Scf

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

WHY IT NEEDS A POLICY

Why scf_add_custom_risk_control needs a policy

This tool creates or modifies data by establishing a link between existing entities. The action is reversible (the link could theoretically be removed), and there is no deletion, destruction, or financial impact.

From the tool's definition The tool description explicitly states 'write — editor+ role' and the operation is 'Link a scoped control to a custom risk', which creates or modifies an association between two entities (a control and a custom risk).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scf_add_custom_risk_control Rate-limited

scf_add_custom_risk_control 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": {
    "scf_add_custom_risk_control": {
      "limits": [
        {
          "counter": "scf_add_custom_risk_control_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 Scf, so you can run agents against it safely.

FAQ

Questions about scf_add_custom_risk_control

What does the scf_add_custom_risk_control tool do? +

Link a scoped control to a custom risk (write — editor+ role). The control must already be scoped (in-scope) for this organization. It is categorised as a Write tool in the Scf MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on scf_add_custom_risk_control? +

Register the Scf MCP server in PolicyLayer and add a rule for scf_add_custom_risk_control: 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 Scf. Nothing to install.

What risk level is scf_add_custom_risk_control? +

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

Can I rate-limit scf_add_custom_risk_control? +

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

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

scf_add_custom_risk_control is provided by the Scf MCP server (mcp-server-scf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.