Search for bus stops, tube stations, and other transit stops in London.
AI agents call search_stops 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 retrieves public transit stop data (bus stops, tube stations) via a search query. It is purely informational with no side effects, data modification, code execution, deletion, or financial impact. The search operation is a typical Read category action that returns existing public information about London transit infrastructure.
From the tool's definition Tool name 'search_stops' and description 'Search for bus stops, tube stations, and other transit stops in London' indicates a query/retrieval operation with no modification or execution capability.
Attacks that exploit this kind of access
Search for bus stops, tube stations, and other transit stops in London. 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_stops: 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_stops 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_stops 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_stops. 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_stops 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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