Search UK legislation by keyword.
AI agents call search_legislation to retrieve information from GovUK MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs information retrieval (search) against UK legislation databases. It has no side effects, does not modify data, does not execute code or commands, and does not delete or create resources. The operation is a straightforward data query matching the 'Read' category. Severity is low because searching public legislation poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'search_legislation' and description 'Search UK legislation by keyword' indicate a read-only query operation that retrieves publicly available legislative data without modification or execution.
Attacks that exploit this kind of access
Search UK legislation by keyword. It is categorised as a Read tool in the GovUK MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GovUK MCP Server MCP server in PolicyLayer and add a rule for search_legislation: 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 GovUK MCP Server. Nothing to install.
search_legislation 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_legislation 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_legislation. 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_legislation is provided by the GovUK MCP Server MCP server (stealth-labs-ltd/govuk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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