knitbrain_save_handoff · Knitbrain MCP: Risk & Policy

WHAT IT DOES

What knitbrain_save_handoff does on Knitbrain

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

WHY IT NEEDS A POLICY

Why knitbrain_save_handoff needs a policy

This tool creates or modifies session handoff data that will be read by subsequent sessions. While it writes data, it does not execute arbitrary code, delete data irreversibly, move money, or read sensitive information.

From the tool's definition The tool 'save_session_handoff' persists session state with language 'Save' and 'handoff state', indicating creation/modification of stored data about the current session context.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

knitbrain_save_handoff Rate-limited

knitbrain_save_handoff 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": {
    "knitbrain_save_handoff": {
      "limits": [
        {
          "counter": "knitbrain_save_handoff_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 Knitbrain, so you can run agents against it safely.

FAQ

Questions about knitbrain_save_handoff

What does the knitbrain_save_handoff tool do? +

Save session handoff state so the next session can resume. It is categorised as a Write tool in the Knitbrain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on knitbrain_save_handoff? +

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

What risk level is knitbrain_save_handoff? +

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

Can I rate-limit knitbrain_save_handoff? +

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

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

knitbrain_save_handoff is provided by the Knitbrain MCP server (pdgit12/knitbrain). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.