set_active_cv_tool · Interview Prep MCP: Risk & Policy

WHAT IT DOES

What set_active_cv_tool does on Interview Prep

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

WHY IT NEEDS A POLICY

Why set_active_cv_tool needs a policy

This tool changes stored state (the active CV preference) but does so reversibly and without side effects beyond affecting which data is used in downstream operations. It does not delete, execute arbitrary code, move money, or trigger external systems. It is a configuration write rather than a data creation/modification tool, but still falls under Write since it persists a preference change.

From the tool's definition "Switch which CV other tools default to" – this modifies the active state/configuration of the system by selecting which CV becomes the default for subsequent operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_active_cv_tool Rate-limited

set_active_cv_tool 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": {
    "set_active_cv_tool": {
      "limits": [
        {
          "counter": "set_active_cv_tool_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 Interview Prep, so you can run agents against it safely.

FAQ

Questions about set_active_cv_tool

What does the set_active_cv_tool tool do? +

Switch which CV other tools default to. It is categorised as a Write tool in the Interview Prep MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_active_cv_tool? +

Register the Interview Prep MCP server in PolicyLayer and add a rule for set_active_cv_tool: 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 Interview Prep. Nothing to install.

What risk level is set_active_cv_tool? +

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

Can I rate-limit set_active_cv_tool? +

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

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

set_active_cv_tool is provided by the Interview Prep MCP server (shenmali/interview-mcp-first). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.