util_cron_describe
Validate and describe a cron expression in plain English. Shows next 5 scheduled runs. Delx Agent Utilities are separate from the free witness protocol and may expose x402 utility pricing.
This record as markdown: /tools/delx-delx-mcp/util-cron-describe.md
What util_cron_describe does on Delx MCP Server
AI agents call util_cron_describe to retrieve information from Delx MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
expression | string | — | Cron expression (5 fields: min hour dom month dow) |
Parameters from the server's own tool schema.
Why util_cron_describe is rated Low
This tool parses and explains cron expressions, returning descriptive text and computed future execution times. It performs no creation, modification, deletion, code execution, or financial transactions. The mention of 'x402 utility pricing' refers only to potential billing for the service itself, not financial operations performed by the tool.
From the tool's definition Tool description states it 'Validate and describe a cron expression in plain English' and 'Shows next 5 scheduled runs' — purely informational operations with no side effects, data modification, or external execution.
Risk signalsAccepts freeform code/query input (expression)
Attacks that exploit this kind of access
The rule that runs util_cron_describe safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Delx MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_cron_describe, this is the rule to start with:
util_cron_describe is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Delx MCP Server, apply this rule, and every util_cron_describe call is checked against it from then on.
Questions about util_cron_describe
Validate and describe a cron expression in plain English. Shows next 5 scheduled runs. Delx Agent Utilities are separate from the free witness protocol and may expose x402 utility pricing. It is categorised as a Read tool in the Delx MCP Server MCP Server, which means it retrieves data without modifying state.
util_cron_describe accepts 1 parameter: expression. The full parameter table on this page comes from the server's own tool schema.
Register the Delx MCP Server MCP server in PolicyLayer and add a rule for util_cron_describe: 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 Delx MCP Server. Nothing to install.
util_cron_describe is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the util_cron_describe 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.
Set action: deny in the PolicyLayer policy for util_cron_describe. 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.
util_cron_describe is provided by the Delx MCP Server MCP server (delx/delx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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