convert_3857_to_4326
AI agents call convert_3857_to_4326 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.
Coordinate conversion is a pure mathematical transformation with no side effects, data modification, or external operations. It reads input coordinates and returns converted values. Confidence is reduced due to empty description, but the naming pattern is consistent with sibling tools (convert_3414_to_3857, convert_4326_to_3414, etc.) which are clearly read-only coordinate conversions.
From the tool's definition Tool name 'convert_3857_to_4326' suggests a coordinate system conversion from EPSG:3857 (Web Mercator) to EPSG:4326 (WGS84 lat/lon). Description is empty.
Attacks that exploit this kind of access
convert_3857_to_4326. 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 convert_3857_to_4326: 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.
convert_3857_to_4326 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 convert_3857_to_4326 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 convert_3857_to_4326. 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.
convert_3857_to_4326 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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