accessible_route
AI agents call accessible_route to retrieve information from Swiss Rail without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to query accessibility information for transport routes based on its name and position in a public transport query API. No description is provided, which moderately reduces confidence, but the sibling tools are all read-only queries of transport data. The pattern suggests this retrieves route accessibility metadata without side effects.
From the tool's definition Tool named 'accessible_route' on a Swiss public transport MCP server alongside sibling tools like 'get_connections', 'get_station_facilities', and 'journey_with_layover' that are all queries.
Attacks that exploit this kind of access
accessible_route. It is categorised as a Read tool in the Swiss Rail MCP Server, which means it retrieves data without modifying state.
Register the Swiss Rail MCP server in PolicyLayer and add a rule for accessible_route: 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 Swiss Rail. Nothing to install.
accessible_route 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 accessible_route 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 accessible_route. 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.
accessible_route is provided by the Swiss Rail MCP server (kintscher/swiss-rail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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