libi.list_effect_packages

List on-disk custom effect packages with their validity (id, name, valid, error?). Use to see what customs are installed and whether any failed to compile.

SERVERLibi SOURCENagellabs/libi

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/libi/libi.list-effect-packages.md

WHAT IT DOES

What libi.list_effect_packages does on Libi

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

RISK

Why libi.list_effect_packages is rated Low

Retrieves and queries installed effect packages without modifying or executing code.

From the tool's definition List on-disk custom effect packages with their validity; see what customs are installed.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs libi.list_effect_packages safely

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

libi.list_effect_packages Allowed

libi.list_effect_packages 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": {
    "libi.list_effect_packages": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about libi.list_effect_packages

What does the libi.list_effect_packages tool do? +

List on-disk custom effect packages with their validity (id, name, valid, error?). Use to see what customs are installed and whether any failed to compile. It is categorised as a Read tool in the Libi MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on libi.list_effect_packages? +

Register the Libi MCP server in PolicyLayer and add a rule for libi.list_effect_packages: 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 Libi. Nothing to install.

What risk level is libi.list_effect_packages? +

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

Can I rate-limit libi.list_effect_packages? +

Yes. Add a rate_limit block to the libi.list_effect_packages 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 libi.list_effect_packages completely? +

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

libi.list_effect_packages is provided by the Libi MCP server (Nagellabs/libi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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