gh_repos · RedisNexus MCP: Risk & Policy

WHAT IT DOES

What gh_repos does on RedisNexus

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

WHY IT NEEDS A POLICY

Why gh_repos needs a policy

While 'list' and 'view' are Read operations, the tool also enables 'create, clone, fork' which create new repositories or repository copies. These are Write operations that create persistent artifacts. Although fork/clone are technically reversible (repos can be deleted), they modify the landscape of repositories and represent resource creation.

From the tool's definition Tool performs actions that create or modify data: 'create, clone, fork' are irreversible or create new resources. The description explicitly lists create, clone, and fork operations which go beyond read-only retrieval.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gh_repos Rate-limited

gh_repos 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": {
    "gh_repos": {
      "limits": [
        {
          "counter": "gh_repos_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 RedisNexus, so you can run agents against it safely.

FAQ

Questions about gh_repos

What does the gh_repos tool do? +

Manage GitHub repositories: list, view, create, clone, fork. It is categorised as a Write tool in the RedisNexus MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gh_repos? +

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

What risk level is gh_repos? +

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

Can I rate-limit gh_repos? +

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

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

gh_repos is provided by the RedisNexus MCP server (rajkumar-madhu/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.