gateway_call_rest · Claude Team MCP: Risk & Policy

WHAT IT DOES

What gateway_call_rest does on Claude Team MCP

AI agents invoke gateway_call_rest to trigger actions in Claude Team 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 gateway_call_rest needs a policy

The name suggests this tool makes outbound REST API calls via some gateway, which constitutes executing external operations with effects that depend on arguments. Without a description, the exact behavior is unknown, but REST calls can trigger arbitrary external side effects. Confidence is lowered due to the empty description.

From the tool's definition Tool name 'gateway_call_rest' implies executing REST API calls through a gateway; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gateway_call_rest Rate-limited

gateway_call_rest 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": {
    "gateway_call_rest": {
      "limits": [
        {
          "counter": "gateway_call_rest_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 Claude Team MCP, so you can run agents against it safely.

FAQ

Questions about gateway_call_rest

What does the gateway_call_rest tool do? +

gateway_call_rest. It is categorised as a Execute tool in the Claude Team 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 gateway_call_rest? +

Register the Claude Team MCP server in PolicyLayer and add a rule for gateway_call_rest: 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 Claude Team MCP. Nothing to install.

What risk level is gateway_call_rest? +

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

Can I rate-limit gateway_call_rest? +

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

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

gateway_call_rest is provided by the Claude Team MCP server (lakshan12367/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.