liara_delete_env_vars

THE RISK

Critical Risk

Why liara_delete_env_vars needs a policy

Deleting environment variables is a destructive operation that cannot be easily undone. Environment variables often contain critical configuration, secrets, API keys, and application settings. Removing them can break application functionality, disable authentication, or cause service outages.

From the tool's definition The tool name explicitly contains 'delete' and the description states 'Delete/unset multiple environment variables for an app'. This is an irreversible action that removes configuration data.

Documented attack patterns abuse exactly the kind of access liara_delete_env_vars gives an agent:

POLICY

How to control liara_delete_env_vars

PolicyLayer is an MCP gateway — it sits between your AI agents and Liara MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for liara_delete_env_vars:

policy.json

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

liara_delete_env_vars disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Liara MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

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EXPLORE

Related tools and policies

More Liara MCP Server tools

Destructive liara_delete_app Delete an app Destructive liara_delete_backup Delete a database backup Destructive liara_delete_bucket Delete a storage bucket Destructive liara_delete_database Delete a database Destructive liara_delete_disk Delete a disk Destructive liara_delete_dns_record Delete a DNS record Destructive liara_delete_env_var Delete/unset an environment variable for an app Destructive liara_delete_ftp_access Delete/revoke FTP access for a disk

All 108 Liara MCP Server tools →

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Go deeper

Critical-risk tools in Liara MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about liara_delete_env_vars

What does the liara_delete_env_vars tool do? +

Delete/unset multiple environment variables for an app. It is categorised as a Destructive tool in the Liara MCP Server 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 liara_delete_env_vars? +

Register the Liara MCP Server MCP server in PolicyLayer and add a rule for liara_delete_env_vars: 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 Liara MCP Server. Nothing to install.

What risk level is liara_delete_env_vars? +

liara_delete_env_vars 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 liara_delete_env_vars? +

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

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

liara_delete_env_vars is provided by the Liara MCP Server MCP server (razavioo/liara-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Liara MCP Server tool call.

Start from Liara MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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