nexus_create_job · NexusToken MCP: Risk & Policy

WHAT IT DOES

What nexus_create_job does on NexusToken

AI agents invoke nexus_create_job to trigger actions in NexusToken. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why nexus_create_job needs a policy

Dispatching a job initiates an external operation whose effects depend on the job arguments and the CapabilitySpec targeted. This is an Execute-category action. The blast radius is high because a misused dispatch could trigger unintended automated workflows or resource consumption at scale. It is not purely Write (creating a record) since 'dispatch' implies active execution.

From the tool's definition 'Dispatch a V2 Job to a specific CapabilitySpec' — dispatching/running a job is an execution action that triggers external operations

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nexus_create_job Rate-limited

nexus_create_job stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "nexus_create_job": {
      "limits": [
        {
          "counter": "nexus_create_job_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about nexus_create_job

What does the nexus_create_job tool do? +

Dispatch a V2 Job to a specific CapabilitySpec in the catalog. It is categorised as a Execute tool in the NexusToken MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nexus_create_job? +

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

What risk level is nexus_create_job? +

nexus_create_job is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit nexus_create_job? +

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

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

nexus_create_job is provided by the NexusToken MCP server (bobuilds/nexustoken-sdk). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.