Advanced search for companies with multiple filters
AI agents call advanced_company_search to retrieve information from Companies House MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a search tool that queries and retrieves company information from the Companies House database with no side effects. It filters existing data but does not create, modify, delete, or execute any operations. The low severity reflects minimal risk: misuse would only expose public company registry data, which is already publicly available through Companies House.
From the tool's definition Tool name 'advanced_company_search' and description 'Advanced search for companies with multiple filters' indicate data retrieval and filtering operations.
Documented attack patterns abuse exactly the kind of access advanced_company_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Companies House MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for advanced_company_search:
{
"version": "1",
"default": "deny",
"tools": {
"advanced_company_search": {}
}
}advanced_company_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Advanced search for companies with multiple filters. It is categorised as a Read tool in the Companies House MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Companies House MCP Server MCP server in PolicyLayer and add a rule for advanced_company_search: 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 Companies House MCP Server. Nothing to install.
advanced_company_search 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 advanced_company_search 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 advanced_company_search. 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.
advanced_company_search is provided by the Companies House MCP Server MCP server (stefanoamorelli/companies-house-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Companies House MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
37 Companies House MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.