Check if a domain is blocked and by which list.
AI agents call search_domains to retrieve information from Mcp Pihole without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a lookup or search operation to retrieve information about domain blocking status. It has no side effects—it neither creates, modifies, deletes, executes code, nor commits financial transactions. It is purely informational, consistent with other Read category tools like 'get_blocking_status' and 'get_domains' on the same server.
From the tool's definition Tool name 'search_domains' and description 'Check if a domain is blocked and by which list' indicate a query operation that retrieves blocking status information without modifying any data.
Attacks that exploit this kind of access
Check if a domain is blocked and by which list. It is categorised as a Read tool in the Mcp Pihole MCP Server, which means it retrieves data without modifying state.
Register the Mcp Pihole MCP server in PolicyLayer and add a rule for search_domains: 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 Mcp Pihole. Nothing to install.
search_domains 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 search_domains 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 search_domains. 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.
search_domains is provided by the Mcp Pihole MCP server (obrien-matthew/mcp-pihole). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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