libi.list_pieces

List available pieces with optional search. Returns the currently-open piece separately in

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-pieces.md

WHAT IT DOES

What libi.list_pieces does on Libi

AI agents call libi.list_pieces 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_pieces is rated Low

Tool retrieves and queries piece metadata without modifying, executing, or deleting data.

From the tool's definition List available pieces with optional search. Returns currently-open piece.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs libi.list_pieces 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_pieces, this is the rule to start with:

libi.list_pieces Allowed

libi.list_pieces 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_pieces": {}
  }
}

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_pieces call is checked against it from then on.

FAQ

Questions about libi.list_pieces

What does the libi.list_pieces tool do? +

List available pieces with optional search. Returns the currently-open piece separately in. 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_pieces? +

Register the Libi MCP server in PolicyLayer and add a rule for libi.list_pieces: 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_pieces? +

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

Can I rate-limit libi.list_pieces? +

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

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

libi.list_pieces 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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