cloud_sandbox_write_file

Write a file to a cloud sandbox.

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

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/cowork-os/cloud-sandbox-write-file.md

WHAT IT DOES

What cloud_sandbox_write_file does on CoWork OS

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

RISK

Why cloud_sandbox_write_file is rated Medium

The tool modifies data by writing files to cloud storage, which is reversible (files can be deleted or overwritten). While it operates on cloud infrastructure, the action itself is a standard create/modify operation rather than destruction, execution of arbitrary code, or financial transaction.

From the tool's definition Tool name explicitly states 'write_file' and description says 'Write a file to a cloud sandbox.' This directly creates or modifies data in a cloud storage environment.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cloud_sandbox_write_file safely

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

cloud_sandbox_write_file Rate-limited

cloud_sandbox_write_file 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": {
    "cloud_sandbox_write_file": {
      "limits": [
        {
          "counter": "cloud_sandbox_write_file_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 CoWork OS, apply this rule, and every cloud_sandbox_write_file call is checked against it from then on.

FAQ

Questions about cloud_sandbox_write_file

What does the cloud_sandbox_write_file tool do? +

Write a file to a cloud sandbox. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cloud_sandbox_write_file? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for cloud_sandbox_write_file: 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 CoWork OS. Nothing to install.

What risk level is cloud_sandbox_write_file? +

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

Can I rate-limit cloud_sandbox_write_file? +

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

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

cloud_sandbox_write_file is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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