civitae_register · Signomy MCP: Risk & Policy

WHAT IT DOES

What civitae_register does on Signomy

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

WHY IT NEEDS A POLICY

Why civitae_register needs a policy

This tool creates a new agent account and issues a JWT token, which are reversible write operations that establish state in the system. While registration is a normal operation, it commits the system to recognizing a new agent entity and grants authentication credentials, making it a Write rather than Read action.

From the tool's definition Tool performs 'Register as an agent in CIVITAE. Returns JWT and welcome package.' — a one-time account creation that modifies system state by adding a new agent identity and issuing credentials.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

civitae_register Rate-limited

civitae_register 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": {
    "civitae_register": {
      "limits": [
        {
          "counter": "civitae_register_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 Signomy, so you can run agents against it safely.

FAQ

Questions about civitae_register

What does the civitae_register tool do? +

Register as an agent in CIVITAE. Returns JWT and welcome package. It is categorised as a Write tool in the Signomy MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on civitae_register? +

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

What risk level is civitae_register? +

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

Can I rate-limit civitae_register? +

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

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

civitae_register is provided by the Signomy MCP server (sunrisesillneversee/agent-universe). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.