wtf_now · Wtf MCP: Risk & Policy

WHAT IT DOES

What wtf_now does on Wtf

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

WHY IT NEEDS A POLICY

Why wtf_now needs a policy

The tool writes/records a journal entry into the SQLite flight recorder database. This is a reversible write operation (inserting a record), not destructive. The description is partially truncated ('Use gen_type' is incomplete), which slightly lowers confidence, but the core action is clearly described as recording/writing data.

From the tool's definition Record a journal entry in the WTF flight recorder

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wtf_now Rate-limited

wtf_now 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": {
    "wtf_now": {
      "limits": [
        {
          "counter": "wtf_now_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 Wtf, so you can run agents against it safely.

FAQ

Questions about wtf_now

What does the wtf_now tool do? +

Record a journal entry in the WTF flight recorder. Use gen_type. It is categorised as a Write tool in the Wtf MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wtf_now? +

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

What risk level is wtf_now? +

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

Can I rate-limit wtf_now? +

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

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

wtf_now is provided by the Wtf MCP server (wave-engineering/mcp-server-wtf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.