get_card_template

Get the resolved DocumentData for a template (without creating a card).

SERVERHa Nexus Agent SOURCEfistacho/ha-nexus-agent

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/fistacho-ha-nexus-agent/get-card-template.md

WHAT IT DOES

What get_card_template does on Ha Nexus Agent

AI agents call get_card_template to retrieve information from Ha Nexus Agent without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_card_template is rated Low

This is a read-only operation that retrieves template information from Home Assistant. The explicit note '(without creating a card)' confirms no side effects or state changes occur. The data is merely queried and returned, making it a Read classification with low severity risk.

From the tool's definition Tool description states 'Get the resolved DocumentData for a template (without creating a card)' — retrieves and returns template data without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_card_template 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 get_card_template, this is the rule to start with:

get_card_template Allowed

get_card_template is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_card_template": {}
  }
}

ALLOW ONLY 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 get_card_template call is checked against it from then on.

FAQ

Questions about get_card_template

What does the get_card_template tool do? +

Get the resolved DocumentData for a template (without creating a card). It is categorised as a Read tool in the Ha Nexus Agent MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_card_template? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for get_card_template: 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 get_card_template? +

get_card_template is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_card_template? +

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

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

get_card_template 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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