replace_body_regex · Reqable MCP: Risk & Policy

WHAT IT DOES

What replace_body_regex does on Reqable

AI agents use replace_body_regex to create or update resources in Reqable — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Reqable environment.

WHY IT NEEDS A POLICY

Why replace_body_regex needs a policy

An AI agent can call replace_body_regex faster than any human can review — one bad instruction and it creates or modifies resources in Reqable by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

replace_body_regex Rate-limited

replace_body_regex stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "replace_body_regex": {
      "limits": [
        {
          "counter": "replace_body_regex_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Reqable, so you can run agents against it safely.

FAQ

Questions about replace_body_regex

What does the replace_body_regex tool do? +

replace_body_regex. It is categorised as a Write tool in the Reqable MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on replace_body_regex? +

Register the Reqable MCP server in PolicyLayer and add a rule for replace_body_regex: 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 Reqable. Nothing to install.

What risk level is replace_body_regex? +

replace_body_regex is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit replace_body_regex? +

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

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

replace_body_regex is provided by the Reqable MCP server (wanghaibo10/reqable-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.