register_api · Ultimate-MCP-Server MCP: Risk & Policy

WHAT IT DOES

What register_api does on Ultimate-MCP-Server

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

WHY IT NEEDS A POLICY

Why register_api needs a policy

The name 'register_api' indicates a write operation that creates or registers API configuration. Without a description, confidence is moderate. The severity is medium as API registration could enable further actions but doesn't directly execute code or delete data. If this registers credentials or modifies routing, it could escalate to higher severity.

From the tool's definition Tool name 'register_api' suggests creating or registering an API endpoint or configuration, which would constitute data creation/modification. No description provided to clarify intent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

register_api Rate-limited

register_api 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_api": {
      "limits": [
        {
          "counter": "register_api_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 Ultimate-MCP-Server, so you can run agents against it safely.

FAQ

Questions about register_api

What does the register_api tool do? +

register_api. It is categorised as a Write tool in the Ultimate-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 register_api? +

Register the Ultimate-MCP-Server MCP server in PolicyLayer and add a rule for register_api: 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 Ultimate-MCP-Server. Nothing to install.

What risk level is register_api? +

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

Can I rate-limit register_api? +

Yes. Add a rate_limit block to the register_api 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_api completely? +

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

register_api is provided by the Ultimate-MCP-Server MCP server (logos-parthenos-ai/ultimate_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.