prettier-format

Formats files with Prettier (--write) and returns a structured list of changed files.

SERVERCargo SOURCEDave-London/Pare

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dave-london-cargo/prettier-format.md

WHAT IT DOES

What prettier-format does on Cargo

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

RISK

Why prettier-format is rated Medium

The tool modifies file contents (reformats them) but the operation is reversible—formatted code can be re-formatted or restored from version control. This qualifies as Write rather than Execute because it performs a specific, bounded transformation rather than arbitrary code execution.

From the tool's definition Tool description states it 'Formats files with Prettier (--write) and returns a structured list of changed files.' The --write flag indicates the tool modifies files in place, which is a reversible write operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs prettier-format safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Cargo, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For prettier-format, this is the rule to start with:

prettier-format Rate-limited

prettier-format 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": {
    "prettier-format": {
      "limits": [
        {
          "counter": "prettier-format_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Cargo, apply this rule, and every prettier-format call is checked against it from then on.

FAQ

Questions about prettier-format

What does the prettier-format tool do? +

Formats files with Prettier (--write) and returns a structured list of changed files. It is categorised as a Write tool in the Cargo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on prettier-format? +

Register the Cargo MCP server in PolicyLayer and add a rule for prettier-format: 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 Cargo. Nothing to install.

What risk level is prettier-format? +

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

Can I rate-limit prettier-format? +

Yes. Add a rate_limit block to the prettier-format 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 prettier-format completely? +

Set action: deny in the PolicyLayer policy for prettier-format. 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 prettier-format? +

prettier-format is provided by the Cargo MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Cargo, and thousands of servers like it.

This server

All 202 Cargo tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →