phone_cancel

Cancel a call plan you proposed that has not started yet.

SERVERCrow SOURCEkh0pper/crow

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/phone-cancel.md

WHAT IT DOES

What phone_cancel does on Crow

AI agents call phone_cancel to permanently remove resources in Crow, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why phone_cancel is rated Critical

Cancelling a call plan is irreversible; the scheduled action cannot be recovered.

From the tool's definition Cancel a call plan... that has not started yet

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs phone_cancel safely

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

phone_cancel Hidden

phone_cancel is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "phone_cancel"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about phone_cancel

What does the phone_cancel tool do? +

Cancel a call plan you proposed that has not started yet. It is categorised as a Destructive tool in the Crow MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on phone_cancel? +

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

What risk level is phone_cancel? +

phone_cancel is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit phone_cancel? +

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

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

phone_cancel is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Crow, and thousands of servers like it.

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All 602 Crow tools → Critical-risk tools on this server →

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Guides

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