star_repository · GitHub MCP Server MCP: Risk & Policy

WHAT IT DOES

What star_repository does on GitHub MCP Server

AI agents use star_repository 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 star_repository needs a policy

Starring a repository on GitHub is a reversible write action (you can unstar). It creates a user preference record but does not delete or overwrite any data, execute code, or involve financial transactions. Severity is low since misuse has minimal blast radius — it only adds a star to a repo on behalf of the user.

From the tool's definition Tool name 'star_repository' suggests adding a star to a GitHub repository. Description is empty, lowering confidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

star_repository Rate-limited

star_repository 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": {
    "star_repository": {
      "limits": [
        {
          "counter": "star_repository_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 star_repository

What does the star_repository tool do? +

star_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 star_repository? +

Register the GitHub MCP Server MCP server in PolicyLayer and add a rule for star_repository: 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 star_repository? +

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

Can I rate-limit star_repository? +

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

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

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