Look up a UK company registered at Companies House by name or registration number. Returns company details including name, status, type, incorporation date, registered address, and SIC codes with their full names and GICS/ICB mappings. Covers 5.6 million UK companies.
Risk signalsAccepts freeform code/query input (query)
Part of the SIC Codes UK server.
Free to start. No card required.
AI agents call lookup_uk_company to retrieve information from SIC Codes UK 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 lookup_uk_company 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": {
"lookup_uk_company": {}
}
}See the full SIC Codes UK policy for all 8 tools.
These attack patterns abuse exactly the kind of access lookup_uk_company 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.
Look up a UK company registered at Companies House by name or registration number. Returns company details including name, status, type, incorporation date, registered address, and SIC codes with their full names and GICS/ICB mappings. Covers 5.6 million UK companies.. It is categorised as a Read tool in the SIC Codes UK MCP Server, which means it retrieves data without modifying state.
Register the SIC Codes UK MCP server in PolicyLayer and add a rule for lookup_uk_company: 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 SIC Codes UK. Nothing to install.
lookup_uk_company 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 lookup_uk_company 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 lookup_uk_company. 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.
lookup_uk_company is provided by the SIC Codes UK MCP server (sic-codes-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 SIC Codes UK tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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