Current Metlink service disruptions and alerts.
AI agents call service_alerts to retrieve information from Wellington Transport Assistant without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing service alert information from Metlink's real-time public transport system. It has no side effects, does not modify data, execute commands, delete records, or move financial resources. The blast radius of misuse is minimal: an agent could at worst flood queries or present stale/incorrect alert data to a user, but cannot harm the transport system or cause irreversible changes.
From the tool's definition Tool retrieves 'Current Metlink service disruptions and alerts' — a read-only query of public transport status data with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Current Metlink service disruptions and alerts. It is categorised as a Read tool in the Wellington Transport Assistant MCP Server, which means it retrieves data without modifying state.
Register the Wellington Transport Assistant MCP server in PolicyLayer and add a rule for service_alerts: 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 Wellington Transport Assistant. Nothing to install.
service_alerts 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 service_alerts 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 service_alerts. 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.
service_alerts is provided by the Wellington Transport Assistant MCP server (sdhilip200/metlink-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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