Returns live positions for all transit vehicles within 1 km of given coordinates. Use when the user asks 'what transport is near me?' or wants a live map of all vehicles around a location without knowing the route. Prefer get_route_realtime when a specific route is already known. Requires decimal...
Part of the Lviv Public Transport server.
Free to start. No card required.
AI agents call get_nearby_vehicles to retrieve information from Lviv Public Transport 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 get_nearby_vehicles 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": {
"get_nearby_vehicles": {}
}
}See the full Lviv Public Transport policy for all 8 tools.
These attack patterns abuse exactly the kind of access get_nearby_vehicles 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.
Returns live positions for all transit vehicles within 1 km of given coordinates. Use when the user asks 'what transport is near me?' or wants a live map of all vehicles around a location without knowing the route. Prefer get_route_realtime when a specific route is already known. Requires decimal latitude and longitude (WGS84); use get_stops_around_location first if you only have a stop name.. It is categorised as a Read tool in the Lviv Public Transport MCP Server, which means it retrieves data without modifying state.
Register the Lviv Public Transport MCP server in PolicyLayer and add a rule for get_nearby_vehicles: 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 Lviv Public Transport. Nothing to install.
get_nearby_vehicles 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 get_nearby_vehicles 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 get_nearby_vehicles. 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.
get_nearby_vehicles is provided by the Lviv Public Transport MCP server (https://api.lad.lviv.ua/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Lviv Public Transport tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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