libi.highlight_effect
Guided edit: flash an effect for the user — a catalog effect (opens the effects panel to that family/phase and flashes the thumbnail) or an effect already applied to a layer
This record as markdown: /tools/libi/libi.highlight-effect.md
What libi.highlight_effect does on Libi
AI agents invoke libi.highlight_effect 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.
Why libi.highlight_effect is rated High
Triggers UI actions in the video editor, opening panels and flashing thumbnails.
From the tool's definition flash an effect for the user — opens the effects panel and flashes
Attacks that exploit this kind of access
The rule that runs libi.highlight_effect 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.highlight_effect, this is the rule to start with:
libi.highlight_effect 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Libi, apply this rule, and every libi.highlight_effect call is checked against it from then on.
Questions about libi.highlight_effect
Guided edit: flash an effect for the user — a catalog effect (opens the effects panel to that family/phase and flashes the thumbnail) or an effect already applied to a layer. 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.
Register the Libi MCP server in PolicyLayer and add a rule for libi.highlight_effect: 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.
libi.highlight_effect is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the libi.highlight_effect 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 libi.highlight_effect. 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.
libi.highlight_effect 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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