query_railways
AI agents call query_railways to retrieve information from Government of Canada Open Data MCP Servers without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on sibling tool patterns and the server's stated purpose of providing data access to public Canadian government transportation infrastructure datasets, 'query_railways' almost certainly retrieves or filters railway-related data (routes, schedules, infrastructure) without side effects. The tool name follows the read-only query pattern consistent with other tools on this server.
From the tool's definition Tool name is 'query_railways' with empty description. Sibling tools like 'query_bridges', 'query_datastore', 'browse_by_topic', and 'get_dataset_schema' are all read-only query operations on public government datasets.
Attacks that exploit this kind of access
query_railways. It is categorised as a Read tool in the Government of Canada Open Data MCP Servers MCP Server, which means it retrieves data without modifying state.
Register the Government of Canada Open Data MCP Servers MCP server in PolicyLayer and add a rule for query_railways: 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 Government of Canada Open Data MCP Servers. Nothing to install.
query_railways 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 query_railways 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 query_railways. 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.
query_railways is provided by the Government of Canada Open Data MCP Servers MCP server (krunal16-c/gov-ca-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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