Fetch railway line information
AI agents call railway-lines to retrieve information from Open Data Model Context Protocol without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves public railway line information from an open data source. It performs a query operation that returns data without modifying, deleting, or executing any actions. The low severity reflects minimal risk—even if an agent misuses this tool, the worst outcome is accessing public information it shouldn't, with no impact on data integrity or system state.
From the tool's definition Tool name 'railway-lines' and description 'Fetch railway line information' indicate data retrieval with no side effects. The verb 'fetch' is characteristic of read operations.
Attacks that exploit this kind of access
Fetch railway line information. It is categorised as a Read tool in the Open Data Model Context Protocol MCP Server, which means it retrieves data without modifying state.
Register the Open Data Model Context Protocol MCP server in PolicyLayer and add a rule for railway-lines: 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 Open Data Model Context Protocol. Nothing to install.
railway-lines 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 railway-lines 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 railway-lines. 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.
railway-lines is provided by the Open Data Model Context Protocol MCP server (opendatamcp/opendatamcp). 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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