Manage environment variables: list, set single/multiple, or delete single/multiple variables
AI agents use liara_manage_env_vars to create or update resources in Liara MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Liara MCP Server environment.
Setting environment variables modifies application configuration reversibly and can include sensitive data like API keys, credentials, and secrets. Deleting variables can break applications. However, these effects are reversible (variables can be re-added), so this is Write rather than Destructive.
From the tool's definition Tool description explicitly states it can 'set' and 'delete' environment variables, with operations on 'single/multiple variables'. The sibling tools confirm this is a cloud infrastructure management server (create_app, create_database, etc.).
Documented attack patterns abuse exactly the kind of access liara_manage_env_vars gives an agent:
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_manage_env_vars:
{
"version": "1",
"default": "deny",
"tools": {
"liara_manage_env_vars": {
"limits": [
{
"counter": "liara_manage_env_vars_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}liara_manage_env_vars 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.
Free to start. No card required.
Manage environment variables: list, set single/multiple, or delete single/multiple variables. It is categorised as a Write tool in the Liara MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Liara MCP Server MCP server in PolicyLayer and add a rule for liara_manage_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.
liara_manage_env_vars is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the liara_manage_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.
Set action: deny in the PolicyLayer policy for liara_manage_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.
liara_manage_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.
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.
Free to start. No card required.
108 Liara MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.