Classifies an IPv4 address by network type — the high-value ad-fraud signal being datacenter traffic posing as residential or living-room (CTV) devices. IP→ASN resolution uses Team Cymru's public service; the ASN is then classified by its registered organization name. PRIVACY: the IP is used for ...
Part of the TunnelMind Data API server.
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AI agents call sigil_verify_ip_type to retrieve information from TunnelMind Data API without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though sigil_verify_ip_type only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"sigil_verify_ip_type": {}
}
}See the full TunnelMind Data API policy for all 54 tools.
These attack patterns abuse exactly the kind of access sigil_verify_ip_type gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Classifies an IPv4 address by network type — the high-value ad-fraud signal being datacenter traffic posing as residential or living-room (CTV) devices. IP→ASN resolution uses Team Cymru's public service; the ASN is then classified by its registered organization name. PRIVACY: the IP is used for lookup only — never logged, never stored. Inputs: - ip (query, required): IPv4 address. IPv6 is not yet supported. Returns: - ip_type: datacenter | residential | mobile | unknown. - confidence: high | medium | low. - asn, asn_name: the resolved autonomous system. - scry_signals: reserved for Scry corpus cross-reference (empty in v1). Latency: - Typical: 100-250ms (two live DNS lookups).. It is categorised as a Read tool in the TunnelMind Data API MCP Server, which means it retrieves data without modifying state.
Register the TunnelMind Data API MCP server in PolicyLayer and add a rule for sigil_verify_ip_type: 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 TunnelMind Data API. Nothing to install.
sigil_verify_ip_type is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the sigil_verify_ip_type 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 sigil_verify_ip_type. 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.
sigil_verify_ip_type is provided by the TunnelMind Data API MCP server (https://mcp-data.tunnelmind.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 54 TunnelMind Data API tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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