cancel_timer

Cancel a running timer helper.

SERVERHa Nexus Agent SOURCEfistacho/ha-nexus-agent

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/fistacho-ha-nexus-agent/cancel-timer.md

WHAT IT DOES

What cancel_timer does on Ha Nexus Agent

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

RISK

Why cancel_timer is rated Critical

Cancelling a timer irreversibly stops it; cannot be undone without manual restart.

From the tool's definition Cancel a running timer helper

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cancel_timer safely

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

cancel_timer Hidden

cancel_timer 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": [
    "cancel_timer"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about cancel_timer

What does the cancel_timer tool do? +

Cancel a running timer helper. It is categorised as a Destructive tool in the Ha Nexus Agent 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 cancel_timer? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for cancel_timer: 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 Ha Nexus Agent. Nothing to install.

What risk level is cancel_timer? +

cancel_timer 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 cancel_timer? +

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

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

cancel_timer is provided by the Ha Nexus Agent MCP server (fistacho/ha-nexus-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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