postdevice · Revel Digital MCP Server MCP: Risk & Policy

WHAT IT DOES

What postdevice does on Revel Digital MCP Server

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

WHY IT NEEDS A POLICY

Why postdevice needs a policy

This tool creates a new device registration in the digital signage system. It's a Write operation as it creates new data but is reversible (the device can be deleted). Misuse could result in unauthorized devices being registered to the system.

From the tool's definition Registers a new device

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

postdevice Rate-limited

postdevice 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": {
    "postdevice": {
      "limits": [
        {
          "counter": "postdevice_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 Revel Digital MCP Server, so you can run agents against it safely.

FAQ

Questions about postdevice

What does the postdevice tool do? +

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

How do I enforce a policy on postdevice? +

Register the Revel Digital MCP Server MCP server in PolicyLayer and add a rule for postdevice: 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 Revel Digital MCP Server. Nothing to install.

What risk level is postdevice? +

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

Can I rate-limit postdevice? +

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

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

postdevice is provided by the Revel Digital MCP Server MCP server (reveldigital/reveldigital-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.