Check a business's Making Tax Digital VAT mandate status via the HMRC API. NOTE: Connects to the HMRC sandbox by default. Set HMRC_API_BASE env var to 'https://api.service.hmrc.gov.uk' for production. Requires HMRC_CLIENT_ID and HMRC_CLIENT_SECRET environment variables (OAuth 2.0). Returns whethe...
Part of the Uk Legal server.
Free to start. No card required.
AI agents call hmrc_check_mtd_status to retrieve information from Uk Legal 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 hmrc_check_mtd_status 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": {
"hmrc_check_mtd_status": {}
}
}See the full Uk Legal policy for all 29 tools.
These attack patterns abuse exactly the kind of access hmrc_check_mtd_status 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.
Check a business's Making Tax Digital VAT mandate status via the HMRC API. NOTE: Connects to the HMRC sandbox by default. Set HMRC_API_BASE env var to 'https://api.service.hmrc.gov.uk' for production. Requires HMRC_CLIENT_ID and HMRC_CLIENT_SECRET environment variables (OAuth 2.0). Returns whether the business is mandated for MTD, effective date, and trading name.. It is categorised as a Read tool in the Uk Legal MCP Server, which means it retrieves data without modifying state.
Register the Uk Legal MCP server in PolicyLayer and add a rule for hmrc_check_mtd_status: 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 Uk Legal. Nothing to install.
hmrc_check_mtd_status 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 hmrc_check_mtd_status 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 hmrc_check_mtd_status. 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.
hmrc_check_mtd_status is provided by the Uk Legal MCP server (bouch/uk-legal). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Uk Legal tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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