inbox_create_reply · MCP Help Scout MCP: Risk & Policy

WHAT IT DOES

What inbox_create_reply does on MCP Help Scout

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

WHY IT NEEDS A POLICY

Why inbox_create_reply needs a policy

This tool creates a new reply message in a customer conversation, which is a reversible write operation. It modifies conversation state by adding content but does not execute arbitrary code, delete data, or involve financial transactions.

From the tool's definition Tool name 'inbox_create_reply' and description 'Send a reply in a conversation' indicate creation of a new message/reply object in Help Scout's Inbox system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

inbox_create_reply Rate-limited

inbox_create_reply 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": {
    "inbox_create_reply": {
      "limits": [
        {
          "counter": "inbox_create_reply_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about inbox_create_reply

What does the inbox_create_reply tool do? +

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

How do I enforce a policy on inbox_create_reply? +

Register the MCP Help Scout MCP server in PolicyLayer and add a rule for inbox_create_reply: 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 MCP Help Scout. Nothing to install.

What risk level is inbox_create_reply? +

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

Can I rate-limit inbox_create_reply? +

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

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

inbox_create_reply is provided by the MCP Help Scout MCP server (solveitsimply/mcp-helpscout). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.