delete_theme

Delete a theme file from themes/<name>.yaml.

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/delete-theme.md

WHAT IT DOES

What delete_theme does on Ha Nexus Agent

AI agents call delete_theme 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 delete_theme is rated Critical

The tool performs an irreversible deletion operation on user configuration (a theme file). Once deleted, the theme cannot be recovered through normal means. This falls squarely into the Destructive category, which takes precedence over Write.

From the tool's definition Tool name includes 'delete' and description explicitly states 'Delete a theme file from `themes/<name>.yaml`'—this irreversibly removes data without undo capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

delete_theme Hidden

delete_theme 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": [
    "delete_theme"
  ]
}

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 delete_theme call is checked against it from then on.

FAQ

Questions about delete_theme

What does the delete_theme tool do? +

Delete a theme file from themes/<name>.yaml. 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 delete_theme? +

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

delete_theme 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 delete_theme? +

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

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

delete_theme 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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