register_service

SERVERNcp SOURCE@portel/ncp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-portel-dev-ncp/register-service.md

WHAT IT DOES

What register_service does on Ncp

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

RISK

Why register_service is rated Medium

Registering a service in Consul creates new service discovery metadata and can modify existing service configurations. This is a reversible write operation that affects service orchestration and discoverability. It could be misused to register malicious services or redirect traffic, but is not destructive (entries can be deregistered) or financially harmful.

From the tool's definition Tool name 'register_service' combined with description 'Register service with Consul' indicates creation or modification of service registry entries in Consul.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs register_service safely

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

register_service Rate-limited

register_service 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": {
    "register_service": {
      "limits": [
        {
          "counter": "register_service_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about register_service

What does the register_service tool do? +

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

How do I enforce a policy on register_service? +

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

What risk level is register_service? +

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

Can I rate-limit register_service? +

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

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

register_service is provided by the Ncp MCP server (@portel/ncp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Ncp, and thousands of servers like it.

This server

All 275 Ncp tools →

Across the catalogue

team_manager_register_agents on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →