create_repo · GitHub MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_repo does on GitHub MCP Server

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

WHY IT NEEDS A POLICY

Why create_repo needs a policy

Creating a repository is a write operation that modifies user account state by adding a new resource. While the action is reversible (repositories can be deleted), it commits resources and changes account structure. This is not merely querying data (Read), does not execute arbitrary code (Execute), and is not irreversible destruction (Destructive).

From the tool's definition Tool name 'create_repo' and description 'Create a new GitHub repository' indicate the tool creates new data (a repository) through GitHub's API, with reversible side effects (repositories can be deleted).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_repo Rate-limited

create_repo 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_repo": {
      "limits": [
        {
          "counter": "create_repo_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 GitHub MCP Server, so you can run agents against it safely.

FAQ

Questions about create_repo

What does the create_repo tool do? +

Create a new GitHub repository. It is categorised as a Write tool in the GitHub MCP Server 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_repo? +

Register the GitHub MCP Server MCP server in PolicyLayer and add a rule for create_repo: 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 GitHub MCP Server. Nothing to install.

What risk level is create_repo? +

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

Can I rate-limit create_repo? +

Yes. Add a rate_limit block to the create_repo 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_repo completely? +

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

create_repo is provided by the GitHub MCP Server MCP server (oghenetejiriorukpegmail/github-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.