AI agents call sg_moe_search_schools to retrieve information from Sgdata without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or searches for publicly available Singapore Ministry of Education school registration data based on filter parameters (name substring, mainlevel). It performs a read-only query against government datasets with no capability to modify, delete, or execute code. The blast radius of misuse is minimal—an agent could only access already-public school information.
From the tool's definition Tool name contains 'search', description indicates it 'search[es] MOE-registered schools by name substring, mainlevel' — a query operation with no side effects.
Attacks that exploit this kind of access
Search MOE-registered schools by name substring, mainlevel. It is categorised as a Read tool in the Sgdata MCP Server, which means it retrieves data without modifying state.
Register the Sgdata MCP server in PolicyLayer and add a rule for sg_moe_search_schools: 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 Sgdata. Nothing to install.
sg_moe_search_schools 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 sg_moe_search_schools 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 sg_moe_search_schools. 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.
sg_moe_search_schools is provided by the Sgdata MCP server (sypherin/sgdata-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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