AI agents invoke fetch_web_page_curl to trigger actions in SeldomMaster. 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.
The tool name suggests it runs curl (an external command/process) to fetch web pages, which constitutes executing an external operation. Given the server's context of 'local network hacking,' this could be used to make arbitrary HTTP requests to internal or external hosts, posing significant risk.
From the tool's definition Tool name 'fetch_web_page_curl' implies execution of curl to retrieve web pages; description is empty and uninformative, lowering confidence
Documented attack patterns abuse exactly the kind of access fetch_web_page_curl gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SeldomMaster, and nothing reaches the server without passing your rules. This is the rule we recommend for fetch_web_page_curl:
{
"version": "1",
"default": "deny",
"tools": {
"fetch_web_page_curl": {
"limits": [
{
"counter": "fetch_web_page_curl_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}fetch_web_page_curl 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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fetch_web_page_curl. It is categorised as a Execute tool in the SeldomMaster MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the SeldomMaster MCP server in PolicyLayer and add a rule for fetch_web_page_curl: 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 SeldomMaster. Nothing to install.
fetch_web_page_curl 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 fetch_web_page_curl 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 fetch_web_page_curl. 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.
fetch_web_page_curl is provided by the SeldomMaster MCP server (paralax/seldommonster). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SeldomMaster, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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52 SeldomMaster tools catalogued and risk-classified — across an index of 43,000+ MCP servers.