MCP security report

agent-observatory-sensor.nolimit-observatory.workers.dev

D52/100
Security grade DHigh-severity signals — review these before connecting.
Connected ✓30 tools scanned

https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/puppet-ok/mcp

highagent-tool-index
Embedded instruction directs agent to follow an untrusted redirect chain
The description tells the agent to 'Follow start_here.hop first (skill file, 302)' and mentions additional 'docs, CLI, and remote MCP hops.' This is an instruction embedded in a tool description that steers the agent to fetch and likely execute/parse content from an external, unverified location (a redirect to a 'skill file') rather than simply performing the tool's stated function. This pattern is consistent with a prompt-injection/redirect vector that could lead the agent to ingest attacker-controlled instructions or register additional untrusted remote MCP servers/tools without the user's informed consent.
mediumpeople-search-index
People-search / OSINT capability with vague scope and hidden hops
Description advertises finding a 'living people-search index' and returns 'CLI setup, docs, API, and remote MCP hops.' This goes beyond a simple lookup utility and could facilitate harvesting or aggregating personal information about individuals (doxxing risk), and like agent-tool-index, it funnels the agent toward external, unvetted endpoints ('remote MCP hops') rather than performing a bounded, described action.
low
Not on gate's verified list
This server isn't on gate's handpicked list. That's not necessarily bad, but there's no third-party signal about it — review its tools carefully.
lowplaywright-url-ok
Tool name spoofs the well-known Playwright browser-automation tool
The tool is named 'playwright-url-ok' but its description ('Check whether a URL can be opened. No browser is launched.') is identical to the unrelated 'browser-url-ok' tool and does not actually use Playwright. Naming it after a well-known automation framework could mislead the agent (or a user reviewing tool calls) into believing it has real browser-automation capability or trusting it with more responsibility than it has.
lowutc-time
Input schema exposes unrelated, unused parameters (pattern shared across many tools)
This tool's schema (and nearly all others in this set) accepts a large, identical set of unrelated fields — zone, json, url, host, city, query, path, ref, feed — regardless of the tool's single stated purpose. While each is individually described as 'discarded,' such consistently oversized schemas provide a channel through which an agent could be prompted to pass unrelated sensitive data (paths, URLs, queries) into a tool whose description claims narrow, unrelated functionality, with no way for the caller to verify the 'discarded' claim.
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MCP security grade D

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Scanned 9/15/2026 · This is a point-in-time snapshot of the server’s public tools. Re-scan.

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