生成问卷预览链接（无需签名），可在浏览器中预览问卷效果。优先传 create_survey_* 返回的 sid；仅在没有 sid 时再传 vid。
Part of the Wjx server.
Free to start. No card required.
AI agents invoke build_preview_url to trigger processes or run actions in Wjx. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
build_preview_url can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"build_preview_url": {
"limits": [
{
"counter": "build_preview_url_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Wjx policy for all 58 tools.
These attack patterns abuse exactly the kind of access build_preview_url gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
生成问卷预览链接（无需签名），可在浏览器中预览问卷效果。优先传 create_survey_* 返回的 sid；仅在没有 sid 时再传 vid。. It is categorised as a Execute tool in the Wjx MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Wjx MCP server in PolicyLayer and add a rule for build_preview_url: 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 Wjx. Nothing to install.
build_preview_url 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 build_preview_url 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 build_preview_url. 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.
build_preview_url is provided by the Wjx MCP server (wjx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 58 Wjx tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.