job_start

Start a background job that keeps running after you answer. Either one tool call,

SERVERMcp Hands SOURCEhuocai250/mcp-hands

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-hands/job-start.md

WHAT IT DOES

What job_start does on Mcp Hands

AI agents invoke job_start to trigger actions in Mcp Hands. 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.

RISK

Why job_start is rated High

job_start triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs job_start safely

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

job_start Rate-limited

job_start 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": {
    "job_start": {
      "limits": [
        {
          "counter": "job_start_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about job_start

What does the job_start tool do? +

Start a background job that keeps running after you answer. Either one tool call,. It is categorised as a Execute tool in the Mcp Hands MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on job_start? +

Register the Mcp Hands MCP server in PolicyLayer and add a rule for job_start: 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 Mcp Hands. Nothing to install.

What risk level is job_start? +

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

Can I rate-limit job_start? +

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

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

job_start is provided by the Mcp Hands MCP server (huocai250/mcp-hands). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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