push_files · Server Puppeteer MCP: Risk & Policy

WHAT IT DOES

What push_files does on Server Puppeteer

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

WHY IT NEEDS A POLICY

Why push_files needs a policy

This tool writes/uploads multiple files to a GitHub repository in a single commit. While commits can be reverted, pushing files can overwrite existing content and affect shared repositories, making this a Write operation with high severity due to the potential blast radius of modifying multiple files in a shared codebase at once.

From the tool's definition Push multiple files to a GitHub repository in a single commit

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

push_files Rate-limited

push_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "push_files": {
      "limits": [
        {
          "counter": "push_files_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 Server Puppeteer, so you can run agents against it safely.

FAQ

Questions about push_files

What does the push_files tool do? +

Push multiple files to a GitHub repository in a single commit. It is categorised as a Write tool in the Server Puppeteer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on push_files? +

Register the Server Puppeteer MCP server in PolicyLayer and add a rule for push_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 Server Puppeteer. Nothing to install.

What risk level is push_files? +

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

Can I rate-limit push_files? +

Yes. Add a rate_limit block to the push_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.

How do I block push_files completely? +

Set action: deny in the PolicyLayer policy for push_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.

What MCP server provides push_files? +

push_files is provided by the Server Puppeteer MCP server (@hisma/server-puppeteer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.