knitbrain_compose_skill · Knitbrain MCP: Risk & Policy

WHAT IT DOES

What knitbrain_compose_skill does on Knitbrain

AI agents use knitbrain_compose_skill 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_compose_skill needs a policy

The tool creates a new skill entry (Write), as indicated by 'Compose a NEW project-tailored skill'. This is a reversible data creation operation stored in the local-first memory system. Misuse could lead to polluted or malicious skill definitions influencing AI agent behavior, hence medium severity.

From the tool's definition Compose a NEW project-tailored skill for a task

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

knitbrain_compose_skill Rate-limited

knitbrain_compose_skill 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_compose_skill": {
      "limits": [
        {
          "counter": "knitbrain_compose_skill_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_compose_skill

What does the knitbrain_compose_skill tool do? +

Compose a NEW project-tailored skill for a task in the USER. 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_compose_skill? +

Register the Knitbrain MCP server in PolicyLayer and add a rule for knitbrain_compose_skill: 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_compose_skill? +

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

Can I rate-limit knitbrain_compose_skill? +

Yes. Add a rate_limit block to the knitbrain_compose_skill 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_compose_skill completely? +

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

knitbrain_compose_skill 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.