Search HM Land Registry Price Paid records — individual residential property sales in England & Wales since 1995. Filter by postcode, town, district, county, price range and sale-date range; sort and page through results. Each record returns price paid (£GBP), sale date, full address, property ty...
Risk signalsHigh parameter count (12 properties)
Part of the Landregistry Uk server.
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AI agents call search_transactions to retrieve information from Landregistry 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 search_transactions 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": {
"search_transactions": {}
}
}See the full Landregistry Uk policy for all 22 tools.
These attack patterns abuse exactly the kind of access search_transactions 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.
Search HM Land Registry Price Paid records — individual residential property sales in England & Wales since 1995. Filter by postcode, town, district, county, price range and sale-date range; sort and page through results. Each record returns price paid (£GBP), sale date, full address, property type, tenure (freehold/leasehold) and new-build flag. Postcodes must be UPPERCASE with a space (e.g. "SW1A 1AA").. It is categorised as a Read tool in the Landregistry Uk MCP Server, which means it retrieves data without modifying state.
Register the Landregistry Uk MCP server in PolicyLayer and add a rule for search_transactions: 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 Landregistry Uk. Nothing to install.
search_transactions 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 search_transactions 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 search_transactions. 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.
search_transactions is provided by the Landregistry Uk MCP server (https://gateway.pipeworx.io/landregistry-uk/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 Landregistry Uk tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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