cache_design · Kiln MCP: Risk & Policy

WHAT IT DOES

What cache_design does on Kiln

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

WHY IT NEEDS A POLICY

Why cache_design needs a policy

This tool writes data to a cache storage system and tracks versions of design files. It creates or modifies stored data (caching), which is a reversible write operation. No code execution, deletion, or financial implications are indicated.

From the tool's definition Cache a 3D design file for faster access and version tracking

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cache_design Rate-limited

cache_design 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": {
    "cache_design": {
      "limits": [
        {
          "counter": "cache_design_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 Kiln, so you can run agents against it safely.

FAQ

Questions about cache_design

What does the cache_design tool do? +

Cache a 3D design file for faster access and version tracking. It is categorised as a Write tool in the Kiln MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cache_design? +

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

What risk level is cache_design? +

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

Can I rate-limit cache_design? +

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

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

cache_design is provided by the Kiln MCP server (codeofaxel/Kiln). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.