repl_expect

Block until a prompt regex matches, the session idles, the child exits, or the timeout fires.

SERVERClaude Mobile SOURCEalexgladkov/claude-in-mobile

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alexgladkov-claude-in-mobile/repl-expect.md

WHAT IT DOES

What repl_expect does on Claude Mobile

AI agents invoke repl_expect to trigger actions in Claude Mobile. 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.

RISK

Why repl_expect is rated High

This tool controls execution flow of an interactive REPL/process session by blocking and waiting for specific conditions. It interacts with a running process/child, which constitutes executing/managing external operations. The tool is part of a mobile automation server that runs shell/ADB/simctl commands, making this an execution-related wait primitive.

From the tool's definition Block until a prompt regex matches, the session idles, the child exits, or the timeout fires

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs repl_expect safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude Mobile, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For repl_expect, this is the rule to start with:

repl_expect Rate-limited

repl_expect 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": {
    "repl_expect": {
      "limits": [
        {
          "counter": "repl_expect_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude Mobile, apply this rule, and every repl_expect call is checked against it from then on.

FAQ

Questions about repl_expect

What does the repl_expect tool do? +

Block until a prompt regex matches, the session idles, the child exits, or the timeout fires. It is categorised as a Execute tool in the Claude Mobile MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on repl_expect? +

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

What risk level is repl_expect? +

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

Can I rate-limit repl_expect? +

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

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

repl_expect is provided by the Claude Mobile MCP server (alexgladkov/claude-in-mobile). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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