update_application_env

Update an environment variable for an application.

SERVERCoolify SOURCEcoolify-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/coolify/update-application-env.md

WHAT IT DOES

What update_application_env does on Coolify

AI agents use update_application_env to create or update resources in Coolify, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Coolify environment.

RISK

Why update_application_env is rated Medium

This tool modifies application configuration by updating environment variables, which is a reversible change. It does not delete data (Destructive), execute arbitrary code (Execute), or move money (Financial). While it could have side effects if environment variables control critical behavior, the action itself is a Write operation that can be reverted by updating the variable again.

From the tool's definition Tool name is 'update_application_env' and description states 'Update an environment variable for an application.' The verb 'update' indicates modification of existing data (environment variables).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_application_env safely

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

update_application_env Rate-limited

update_application_env stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_application_env": {
      "limits": [
        {
          "counter": "update_application_env_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about update_application_env

What does the update_application_env tool do? +

Update an environment variable for an application. It is categorised as a Write tool in the Coolify MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_application_env? +

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

What risk level is update_application_env? +

update_application_env is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_application_env? +

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

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

update_application_env is provided by the Coolify MCP server (coolify-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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