gateway_call_tool · Claude Team MCP: Risk & Policy

WHAT IT DOES

What gateway_call_tool does on Claude Team MCP

AI agents invoke gateway_call_tool 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_tool needs a policy

The name implies executing or proxying calls to other tools, which is an Execute-category action. However, the description is empty and uninformative, so the exact behavior is unknown. Given the server context (coordinated AI coding agents) and the 'gateway' prefix suggesting it routes/dispatches calls to other tools, Execute is the most likely category.

From the tool's definition Tool name 'gateway_call_tool' suggests invoking or calling another tool through a gateway mechanism

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gateway_call_tool Rate-limited

gateway_call_tool 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_tool": {
      "limits": [
        {
          "counter": "gateway_call_tool_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_tool

What does the gateway_call_tool tool do? +

gateway_call_tool. 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_tool? +

Register the Claude Team MCP server in PolicyLayer and add a rule for gateway_call_tool: 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_tool? +

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

Can I rate-limit gateway_call_tool? +

Yes. Add a rate_limit block to the gateway_call_tool 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_tool completely? +

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

gateway_call_tool 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.