io.github.cyanheads/hn-mcp-server

by io.github.cyanheads· v0.7.0Official MCP Registry

Findings

Detected by Squatch rules from the server's metadata and protocol behavior. Latest completed scan: Nov 14, 2026, 08:29 UTC.

No open findings

The latest scan did not detect any issue covered by our rules. That is not a guarantee: see what the scan does not cover.

1 resolved or dismissed finding

MediumResolvedSQ-TOOL-INJECTION-INSTRUCTIONS

Instructions addressed to the AI model

Model-facing text contains instructions addressed to the AI model rather than a description of the tool (for example to override prior instructions, to act before using tools, or to react to trigger phrases).

First seen Oct 28, 2026 · Last seen Nov 12, 2026

Suggested fix: Describe what the tool does and its parameters. Do not include instructions to the model about other tools, the user or the conversation.

Status history

ResolvedSquatchNov 14, 2026, 08:29 UTC

What this scan does not cover

Squatch never calls a server's tools, so it cannot see what they actually do at run time.
It scans without credentials: tools behind authentication may not be visible.
It does not review source code, dependencies or the publisher's infrastructure.
A server can change behavior between scans; monitoring compares each scan with the last.
Classifications come from tool names, descriptions and schemas, which the publisher controls.

How Squatch scans servers

Security scan

No critical findings detected

No open findings at HIGH or above; lower-severity findings: 0 medium, 0 low, 0 info.

1 piece of evidence

Source: Squatch observedscan
Metadata and configuration analysis; tools are not executed.
Observed Nov 14, 2026, 08:29 UTC

Last checked Nov 14, 2026, 08:29 UTC

Authentication

Squatch observed

Summary: { "type": "none", "challengeStatus": null, "scopesSupported": [], "resourceMetadataUrl": null, "authorizationServers": [] }

Protocol conformance

Checks: { "checks": [ { "check": "tools_list_deterministic", "passed": true }, { "check": "list_methods_succeed", "passed": true }, { "check": "list_results_schema_valid", "passed": true }, { "check": "pagination_terminates", "passed": true }, { "check": "tool_names_valid", "passed": true }, { "check": "tool_names_unique", "passed": true }, { "check": "no_network_schema_refs", "passed": true }, { "check": "x_mcp_header_valid", "passed": true }, { "check": "icon_urls_https_or_data", "detail": "no icons declared", "passed": true }, { "check": "discover_present", "passed": true }, { "check": "result_type_present", "passed": true }, { "check": "cacheable_fields_present", "passed": true }, { "check": "server_info_in_meta", "passed": true }, { "check": "no_session_id", "passed": true }, { "check": "unknown_method_404", "passed": true }, { "check": "notification_202", "passed": true }, { "check": "get_405", "passed": true } ], "toolsListNondeterministic": false }

Full technical details