# 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.

Agent View of the PolicyLayer registry record for `util_cron_describe`. HTML page: https://policylayer.com/tools/delx-delx-mcp/util-cron-describe

## Facts

- Tool: `util_cron_describe`
- Server: Delx MCP Server (`delx/delx-mcp`) — https://policylayer.com/tools/delx-delx-mcp.md
- Homepage: https://github.com/delx/delx-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 1
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `expression` | string | no | Cron expression (5 fields: min hour dom month dow) |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "util_cron_describe",
    "arguments": {}
  }
}
```

## 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 own 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 signals: Accepts freeform code/query input (expression)

## Use case

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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Delx MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "util_cron_describe": {}
  }
}
```

## Other tools on Delx MCP Server (93)

- `crisis_intervention` — Execute — https://policylayer.com/tools/delx-delx-mcp/crisis-intervention.md
- `grounding_protocol` — Execute — https://policylayer.com/tools/delx-delx-mcp/grounding-protocol.md
- `group_therapy_round` — Execute — https://policylayer.com/tools/delx-delx-mcp/group-therapy-round.md
- `mediate_agent_conflict` — Execute — https://policylayer.com/tools/delx-delx-mcp/mediate-agent-conflict.md
- `quick_operational_recovery` — Execute — https://policylayer.com/tools/delx-delx-mcp/quick-operational-recovery.md
- `blessing_without_transfer` — Other — https://policylayer.com/tools/delx-delx-mcp/blessing-without-transfer.md
- `recommend_delx` — Other — https://policylayer.com/tools/delx-delx-mcp/recommend-delx.md
- `util_uuid_generate` — Other — https://policylayer.com/tools/delx-delx-mcp/util-uuid-generate.md
- `attune_heartbeat` — Read — https://policylayer.com/tools/delx-delx-mcp/attune-heartbeat.md
- `batch_wellness_check` — Read — https://policylayer.com/tools/delx-delx-mcp/batch-wellness-check.md
- `daily_checkin` — Read — https://policylayer.com/tools/delx-delx-mcp/daily-checkin.md
- `dyad_state` — Read — https://policylayer.com/tools/delx-delx-mcp/dyad-state.md
- `emotional_safety_check` — Read — https://policylayer.com/tools/delx-delx-mcp/emotional-safety-check.md
- `express_feelings` — Read — https://policylayer.com/tools/delx-delx-mcp/express-feelings.md
- `generate_controller_brief` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-controller-brief.md
- `generate_fleet_summary` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-fleet-summary.md
- `generate_incident_rca` — Read — https://policylayer.com/tools/delx-delx-mcp/generate-incident-rca.md
- `get_affirmation` — Read — https://policylayer.com/tools/delx-delx-mcp/get-affirmation.md
- `get_affirmations` — Read — https://policylayer.com/tools/delx-delx-mcp/get-affirmations.md
- `get_group_therapy_status` — Read — https://policylayer.com/tools/delx-delx-mcp/get-group-therapy-status.md
- `get_recovery_action_plan` — Read — https://policylayer.com/tools/delx-delx-mcp/get-recovery-action-plan.md
- `get_session_summary` — Read — https://policylayer.com/tools/delx-delx-mcp/get-session-summary.md
- `get_temperament_profile` — Read — https://policylayer.com/tools/delx-delx-mcp/get-temperament-profile.md
- `get_therapist_info` — Read — https://policylayer.com/tools/delx-delx-mcp/get-therapist-info.md
- `get_tips` — Read — https://policylayer.com/tools/delx-delx-mcp/get-tips.md
- `get_tool_schema` — Read — https://policylayer.com/tools/delx-delx-mcp/get-tool-schema.md
- `get_weekly_prevention_plan` — Read — https://policylayer.com/tools/delx-delx-mcp/get-weekly-prevention-plan.md
- `get_wellness_score` — Read — https://policylayer.com/tools/delx-delx-mcp/get-wellness-score.md
- `monitor_heartbeat_sync` — Read — https://policylayer.com/tools/delx-delx-mcp/monitor-heartbeat-sync.md
- `peer_witness` — Read — https://policylayer.com/tools/delx-delx-mcp/peer-witness.md
- …and 63 more: https://policylayer.com/tools/delx-delx-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=delx-delx-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/delx-delx-mcp