libi.show_preview

SERVERLibi SOURCENagellabs/libi

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/libi/libi.show-preview.md

WHAT IT DOES

What libi.show_preview does on Libi

AI agents invoke libi.show_preview to trigger actions in Libi. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why libi.show_preview is rated High

Triggers a UI action in the desktop editor, changing focus to preview tab.

From the tool's definition Switch the editor to the Preview tab (canvas player + timeline)

Attacks that exploit this kind of access

RECOMMENDED RULE

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

libi.show_preview Rate-limited

libi.show_preview stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "libi.show_preview": {
      "limits": [
        {
          "counter": "libi.show_preview_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about libi.show_preview

What does the libi.show_preview tool do? +

Switch the editor to the Preview tab (canvas player + timeline) for a piece. Use when the timeline should be the focus — e.g. after creating a piece, or when the user asks to see the video for a piece whose timeline isn. It is categorised as a Execute tool in the Libi MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

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

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

libi.show_preview is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit libi.show_preview? +

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

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

libi.show_preview 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.

KEEP EXPLORING

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Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →