generate_csf · Musea MCP: Risk & Policy

WHAT IT DOES

What generate_csf does on Musea

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

WHY IT NEEDS A POLICY

Why generate_csf needs a policy

The tool creates new code output (Storybook CSF format) from input files, making it a Write operation. It does not execute external commands, delete data irreversibly, or modify financial state.

From the tool's definition Tool description states it converts .art.vue files into Storybook CSF 3.0 code, which involves creating or generating new code artifacts. The action is reversible—generated files can be modified or deleted.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_csf Rate-limited

generate_csf 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": {
    "generate_csf": {
      "limits": [
        {
          "counter": "generate_csf_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 Musea, so you can run agents against it safely.

FAQ

Questions about generate_csf

What does the generate_csf tool do? +

Convert an .art.vue file into Storybook CSF 3.0 code for integration with existing Storybook setups. It is categorised as a Write tool in the Musea MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_csf? +

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

What risk level is generate_csf? +

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

Can I rate-limit generate_csf? +

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

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

generate_csf is provided by the Musea MCP server (@vizejs/musea-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.