渲染前必须：拉取当前项目的 HTML 与配音文案等摘要，并返回本机只读预览页 URL。请先让用户在浏览器打开 previewUrl 核对；用户口头确认无误后，再在 render_video 中传入 user_confirmed_content: true。
AI agents call get_render_preview to retrieve information from Flash Cast without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches and displays project information for review before rendering. It retrieves data (HTML, script summaries) and generates a preview URL for inspection—a read-only operation with no side effects. Users must explicitly confirm content in a separate render_video call before any actual rendering occurs. The read-only nature (只读) and lack of data modification place this firmly in the Read category.
From the tool's definition Tool description states it 'pulls current project HTML and voiceover script summaries' and 'returns a read-only preview page URL' (只读预览页). The operation retrieves data and provides a preview without modifying anything.
Attacks that exploit this kind of access
渲染前必须：拉取当前项目的 HTML 与配音文案等摘要，并返回本机只读预览页 URL。请先让用户在浏览器打开 previewUrl 核对；用户口头确认无误后，再在 render_video 中传入 user_confirmed_content: true。. It is categorised as a Read tool in the Flash Cast MCP Server, which means it retrieves data without modifying state.
Register the Flash Cast MCP server in PolicyLayer and add a rule for get_render_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 Flash Cast. Nothing to install.
get_render_preview is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_render_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.
Set action: deny in the PolicyLayer policy for get_render_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.
get_render_preview is provided by the Flash Cast MCP server (trtian/flash-cast-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_render_preview is one line of Flash Cast's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →