call_github_graphql · GitHub GraphQL API MCP: Risk & Policy

WHAT IT DOES

What call_github_graphql does on GitHub GraphQL API MCP

AI agents invoke call_github_graphql to trigger actions in GitHub GraphQL API MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why call_github_graphql needs a policy

call_github_graphql triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

call_github_graphql Rate-limited

call_github_graphql stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "call_github_graphql": {
      "limits": [
        {
          "counter": "call_github_graphql_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 GraphQL API MCP, so you can run agents against it safely.

FAQ

Questions about call_github_graphql

What does the call_github_graphql tool do? +

A tool to execute GitHub GraphQL API queries. Before using, it's recommended to check the documentation first, and include ID fields in your queries for easier follow-up operations. It is categorised as a Execute tool in the GitHub GraphQL API MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on call_github_graphql? +

Register the GitHub GraphQL API MCP server in PolicyLayer and add a rule for call_github_graphql: 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 GraphQL API MCP. Nothing to install.

What risk level is call_github_graphql? +

call_github_graphql is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit call_github_graphql? +

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

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

call_github_graphql is provided by the GitHub GraphQL API MCP server (wanzunz/github_graphql_api_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.