Write multiple files concurrently. Supports text, PDF, and DOCX with HTML formatting.
AI agents use write_multiple_files to create or update resources in Vulcan File Ops — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Vulcan File Ops environment.
This tool creates or modifies files across the filesystem, which is a Write operation. The severity is medium because writing multiple files concurrently could overwrite important data or fill storage, but the operation is reversible (files can be deleted or edited). The confidence is high because the name and description explicitly state the write operation.
From the tool's definition Tool name is 'write_multiple_files' and description states 'Write multiple files concurrently. Supports text, PDF, and DOCX with HTML formatting.' The verb 'write' and the action of creating/modifying files indicates reversible data creation/modification.
Documented attack patterns abuse exactly the kind of access write_multiple_files gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Vulcan File Ops, and nothing reaches the server without passing your rules. This is the rule we recommend for write_multiple_files:
{
"version": "1",
"default": "deny",
"tools": {
"write_multiple_files": {
"limits": [
{
"counter": "write_multiple_files_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}write_multiple_files 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.
Free to start. No card required.
Write multiple files concurrently. Supports text, PDF, and DOCX with HTML formatting. It is categorised as a Write tool in the Vulcan File Ops MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Vulcan File Ops MCP server in PolicyLayer and add a rule for write_multiple_files: 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 Vulcan File Ops. Nothing to install.
write_multiple_files is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the write_multiple_files 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.
Set action: deny in the PolicyLayer policy for write_multiple_files. 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.
write_multiple_files is provided by the Vulcan File Ops MCP server (n0zer0d4y/vulcan-file-ops). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Vulcan File Ops, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
15 Vulcan File Ops tools catalogued and risk-classified — across an index of 43,000+ MCP servers.