get_nearby_mrt_stations
AI agents call get_nearby_mrt_stations to retrieve information from OneMap MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves public transport information (MRT stations near a location) without modifying, executing external operations, deleting data, or moving money. It is a straightforward Read operation with minimal risk—worst case, an agent could retrieve irrelevant or excessive location data, but no side effects occur.
From the tool's definition Tool name 'get_nearby_mrt_stations' indicates retrieval of MRT station data. The server description confirms it provides 'public transport data' and 'location searches'.
Attacks that exploit this kind of access
get_nearby_mrt_stations. It is categorised as a Read tool in the OneMap MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OneMap MCP Server MCP server in PolicyLayer and add a rule for get_nearby_mrt_stations: 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 OneMap MCP Server. Nothing to install.
get_nearby_mrt_stations 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_nearby_mrt_stations 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_nearby_mrt_stations. 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_nearby_mrt_stations is provided by the OneMap MCP Server MCP server (linzele/mcp-onemap). 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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