Analyze a URL for threats and malicious content.
AI agents invoke scan_url to trigger actions in Threat Zone MCP Server. 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.
Scanning a URL for threats involves actively fetching and executing/analyzing the URL in a sandbox environment, which triggers external operations beyond simple data retrieval. This aligns with Execute rather than Read, as it causes side effects (sandbox execution, threat analysis pipeline). Severity is medium since misuse could cause unintended scanning of URLs or resource consumption, but blast radius is limited.
From the tool's definition "Analyze a URL for threats and malicious content" — submits a URL to a sandbox/analysis engine for active scanning and execution
Documented attack patterns abuse exactly the kind of access scan_url gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Threat Zone MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for scan_url:
{
"version": "1",
"default": "deny",
"tools": {
"scan_url": {
"limits": [
{
"counter": "scan_url_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}scan_url 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.
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Analyze a URL for threats and malicious content. It is categorised as a Execute tool in the Threat Zone MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Threat Zone MCP Server MCP server in PolicyLayer and add a rule for scan_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 Threat Zone MCP Server. Nothing to install.
scan_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 scan_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 scan_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.
scan_url is provided by the Threat Zone MCP Server MCP server (threat-zone/threatzonemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Threat Zone MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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31 Threat Zone MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.