apply_multi_file_batch · Vigentic MCP: Risk & Policy

WHAT IT DOES

What apply_multi_file_batch does on Vigentic MCP

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

WHY IT NEEDS A POLICY

Why apply_multi_file_batch needs a policy

This tool creates or modifies data (code in files) in a reversible manner via edits. It is not Read (applies changes), not Destructive (edits are typically reversible via checkpoints or version control), not Execute (does not run code), and not Financial. The severity is high because misuse could corrupt multiple files simultaneously, but it remains reversible and includes checkpoint functionality for recovery.

From the tool's definition Tool description states 'apply ordered explicit-target edit batches across multiple files' which modifies file contents. Also part of a suite that includes 'apply_edit_batch', 'apply_hunk', 'create_file', 'delete_file' indicating write/edit operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

apply_multi_file_batch Rate-limited

apply_multi_file_batch 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": {
    "apply_multi_file_batch": {
      "limits": [
        {
          "counter": "apply_multi_file_batch_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 Vigentic MCP, so you can run agents against it safely.

FAQ

Questions about apply_multi_file_batch

What does the apply_multi_file_batch tool do? +

Preview or apply ordered explicit-target edit batches across multiple files, with optional checkpoint saves for the touched targets. It is categorised as a Write tool in the Vigentic MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on apply_multi_file_batch? +

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

What risk level is apply_multi_file_batch? +

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

Can I rate-limit apply_multi_file_batch? +

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

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

apply_multi_file_batch is provided by the Vigentic MCP server (munozu/vigentic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.