create_or_update_file · Universal Mcp Toolkit MCP

WHAT IT DOES

What create_or_update_file does on Universal Mcp Toolkit

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

WHY IT NEEDS A POLICY

Why create_or_update_file needs a policy

This tool creates or modifies files in a GitHub repository. While modification is reversible (via git history and revert), the immediate effect is a write operation that persists across commits. It does not delete files irreversibly, so Destructive does not apply.

From the tool's definition create_or_update_file with description 'Create a new file or replace an existing file in a GitHub repository with a commit' — the term 'replace' indicates modification of existing files, and the word 'commit' shows it writes to a repository with persistent…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_or_update_file Rate-limited

create_or_update_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": {
    "create_or_update_file": {
      "limits": [
        {
          "counter": "create_or_update_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Universal Mcp Toolkit, so you can run agents against it safely.

FAQ

Questions about create_or_update_file

What does the create_or_update_file tool do? +

Create a new file or replace an existing file in a GitHub repository with a commit. It is categorised as a Write tool in the Universal Mcp Toolkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_or_update_file? +

Register the Universal Mcp Toolkit MCP server in PolicyLayer and add a rule for create_or_update_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 Universal Mcp Toolkit. Nothing to install.

What risk level is create_or_update_file? +

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

Can I rate-limit create_or_update_file? +

Yes. Add a rate_limit block to the create_or_update_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 create_or_update_file completely? +

Set action: deny in the PolicyLayer policy for create_or_update_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 create_or_update_file? +

create_or_update_file is provided by the Universal Mcp Toolkit MCP server (markgatcha/universal-mcp-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.