Explain a cron expression in plain English. Supports 5-field cron and special strings like @daily.
AI agents call explain_cron_expression to retrieve information from Mcp Crontab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and interprets information about cron expressions without creating side effects. It does not modify crontab entries, execute commands, delete anything, or move money. The most severe action it could enable is misuse for understanding when malicious cron jobs would run, but the tool itself performs no destructive or executable operations. It is a read-only information tool.
From the tool's definition The tool 'explain_cron_expression' takes a cron expression as input and returns a plain English explanation of it.
Attacks that exploit this kind of access
Explain a cron expression in plain English. Supports 5-field cron and special strings like @daily. It is categorised as a Read tool in the Mcp Crontab MCP Server, which means it retrieves data without modifying state.
Register the Mcp Crontab MCP server in PolicyLayer and add a rule for explain_cron_expression: 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 Crontab. Nothing to install.
explain_cron_expression 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 explain_cron_expression 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 explain_cron_expression. 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.
explain_cron_expression is provided by the Mcp Crontab MCP server (jasona7/mcp-crontab-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →