get_exemptions

THE RISK

Low Risk

Why get_exemptions needs a policy

This tool retrieves exemptions data associated with a company from the Companies House database. There are no indications of write, execute, destructive, or financial operations. The action is a straightforward query that returns existing public company information without side effects.

From the tool's definition Tool name 'get_exemptions' and description 'Get company exemptions information' indicate data retrieval with no modification. The verb 'Get' is a standard Read operation.

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

POLICY

How to control get_exemptions

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_exemptions:

policy.json

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

get_exemptions 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_exemptions

What does the get_exemptions tool do? +

Get company exemptions information. 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_exemptions? +

Register the Companies House MCP Server MCP server in PolicyLayer and add a rule for get_exemptions: 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_exemptions? +

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

Can I rate-limit get_exemptions? +

Yes. Add a rate_limit block to the get_exemptions 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_exemptions completely? +

Set action: deny in the PolicyLayer policy for get_exemptions. 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_exemptions? +

get_exemptions 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 →