codex_ask · Codex Bridge MCP: Risk & Policy

WHAT IT DOES

What codex_ask does on Codex Bridge

AI agents invoke codex_ask to trigger actions in Codex Bridge. 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 codex_ask needs a policy

This tool sends a request to an external LLM service (GPT Codex), executing an external operation. While it primarily retrieves information/analysis, it crosses into Execute territory because it triggers an external service call with effects that depend on arguments. The server description mentions 'adversarial planning' and 'risk triage', meaning the outputs could guide consequential downstream actions.

From the tool's definition 'Ask GPT Codex a question or brainstorm an idea' — triggers an external API call to GPT Codex, whose effects depend on the arguments passed

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

codex_ask Rate-limited

codex_ask 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": {
    "codex_ask": {
      "limits": [
        {
          "counter": "codex_ask_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 Codex Bridge, so you can run agents against it safely.

FAQ

Questions about codex_ask

What does the codex_ask tool do? +

Ask GPT Codex a question or brainstorm an idea. Codex acts as a critical thinking partner — it will challenge assumptions and surface risks. It is categorised as a Execute tool in the Codex Bridge MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on codex_ask? +

Register the Codex Bridge MCP server in PolicyLayer and add a rule for codex_ask: 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 Codex Bridge. Nothing to install.

What risk level is codex_ask? +

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

Can I rate-limit codex_ask? +

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

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

codex_ask is provided by the Codex Bridge MCP server (ndcorder/claude-codex-team). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.