get_psc_legal_person

THE RISK

Low Risk

Why get_psc_legal_person needs a policy

This tool retrieves publicly available company ownership/control data from the Companies House registry. It has no side effects, does not modify data, execute code, delete records, or involve financial transactions. The 'get' pattern combined with read-only access to regulatory filing data clearly categorizes this as a Read operation with low severity risk.

From the tool's definition Tool name 'get_psc_legal_person' uses 'get' verb and description states 'Get legal person with significant control' — both indicate data retrieval with no modification or execution.

Documented attack patterns abuse exactly the kind of access get_psc_legal_person gives an agent:

POLICY

How to control get_psc_legal_person

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 get_psc_legal_person:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_psc_legal_person": {}
  }
}

get_psc_legal_person is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Companies House MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Companies House MCP Server tools

Read advanced_company_search Advanced search for companies with multiple filters Read alphabetical_search Search companies alphabetically by name prefix Read dissolved_search Search for dissolved companies Read get_charge_details Get details of a specific charge Read get_charges Get charges registered against a specific company Read get_company_profile Get detailed profile information for a specific company Read get_corporate_officer_disqualification Get disqualification details for a corporate officer Read get_document_content Fetch a document content (PDF)

All 37 Companies House MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_psc_legal_person

What does the get_psc_legal_person tool do? +

Get legal person with significant control. It is categorised as a Read tool in the Companies House MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_psc_legal_person? +

Register the Companies House MCP Server MCP server in PolicyLayer and add a rule for get_psc_legal_person: 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.

What risk level is get_psc_legal_person? +

get_psc_legal_person is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_psc_legal_person? +

Yes. Add a rate_limit block to the get_psc_legal_person 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.

How do I block get_psc_legal_person completely? +

Set action: deny in the PolicyLayer policy for get_psc_legal_person. 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.

What MCP server provides get_psc_legal_person? +

get_psc_legal_person 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.

Enforce policy on every Companies House MCP Server tool call.

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.

CHECK YOUR STACK →