crontab_modify

Modify an existing cron job.

SERVERAapanel SOURCEnipunanirmal/aapanel-mcp

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/aapanel-mcp/crontab-modify.md

WHAT IT DOES

What crontab_modify does on Aapanel

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

RISK

Why crontab_modify is rated Medium

Modifying a cron job changes scheduled task configuration. This is a Write operation (reversible modification), but carries high severity because a misconfigured cron job could execute arbitrary commands, disrupt system operations, or be used to establish persistence on the server.

From the tool's definition Modify an existing cron job

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crontab_modify safely

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

crontab_modify Rate-limited

crontab_modify 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": {
    "crontab_modify": {
      "limits": [
        {
          "counter": "crontab_modify_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 Aapanel, apply this rule, and every crontab_modify call is checked against it from then on.

FAQ

Questions about crontab_modify

What does the crontab_modify tool do? +

Modify an existing cron job. It is categorised as a Write tool in the Aapanel MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on crontab_modify? +

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

What risk level is crontab_modify? +

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

Can I rate-limit crontab_modify? +

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

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

crontab_modify is provided by the Aapanel MCP server (nipunanirmal/aapanel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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