unstar_repository

Unstar a GitHub repository

SERVERGitHub SOURCEoci:ghcr.io/github/github-mcp-server:1.3.0

Medium RISK CLASS

Category Write

Parameters 20 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity verified Pull the record →

This record as markdown: /tools/github/unstar-repository.md

WHAT IT DOES

What unstar_repository does on GitHub

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

Parameter	Type	Required	Description
`repo`	string	—	Repository name
`owner`	string	—	Repository owner

Parameters from the server's own tool schema.

RISK

Why unstar_repository is rated Medium

Unstarring a repository removes a star/bookmark from a GitHub repo. This is a reversible write action (the user can re-star at any time) with minimal blast radius — it only affects the authenticated user's star list and the repository's star count.

From the tool's definition Unstar a GitHub repository

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unstar_repository safely

PolicyLayer is an MCP gateway: it sits between your AI agents and GitHub, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For unstar_repository, this is the rule to start with:

unstar_repository Rate-limited

unstar_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": {
    "unstar_repository": {
      "limits": [
        {
          "counter": "unstar_repository_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect GitHub, apply this rule, and every unstar_repository call is checked against it from then on.

FAQ

Questions about unstar_repository

What does the unstar_repository tool do? +

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

What parameters does unstar_repository accept? +

unstar_repository accepts 2 parameters: repo, owner. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on unstar_repository? +

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

What risk level is unstar_repository? +

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

Can I rate-limit unstar_repository? +

Yes. Add a rate_limit block to the unstar_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 unstar_repository completely? +

Set action: deny in the PolicyLayer policy for unstar_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 unstar_repository? +

unstar_repository is provided by the GitHub MCP server (oci:ghcr.io/github/github-mcp-server:1.3.0). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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