Get real-time bus arrival times and information for a specific bus stop
AI agents call get_bus_arrival to retrieve information from Singapore Location Intelligence MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries real-time transit data without modifying, executing external operations, deleting data, or moving money. It is a straightforward read operation that returns informational content to help users check bus schedules. Low severity due to minimal blast radius if misused—the worst outcome would be providing stale or incorrect transit information to a user.
From the tool's definition Tool name and description indicate retrieval of real-time bus arrival times and information for a specific bus stop. The verb 'Get' combined with 'real-time...information' describes a query operation with no side effects.
Attacks that exploit this kind of access
Get real-time bus arrival times and information for a specific bus stop. It is categorised as a Read tool in the Singapore Location Intelligence MCP MCP Server, which means it retrieves data without modifying state.
Register the Singapore Location Intelligence MCP server in PolicyLayer and add a rule for get_bus_arrival: 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 Singapore Location Intelligence MCP. Nothing to install.
get_bus_arrival 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_bus_arrival 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_bus_arrival. 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_bus_arrival is provided by the Singapore Location Intelligence MCP server (siva-sub/mcp-public-transport). 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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