AI agents call sg_weather_2h to retrieve information from Sg Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves real-time weather forecast data from Singapore's government data source (data.gov.sg). It is a straightforward read operation with no side effects. The tool queries existing public meteorological data and returns information to the user. There is no capability to modify data, execute commands, delete records, or conduct financial transactions.
From the tool's definition Tool name 'sg_weather_2h' and description 'Get Singapore 2-hour weather forecast by area' indicates data retrieval only. No modification, execution, deletion, or financial operations are performed.
Attacks that exploit this kind of access
Get Singapore 2-hour weather forecast by area. Use when you need current or upcoming weather for any Singapore location. It is categorised as a Read tool in the Sg Data MCP Server, which means it retrieves data without modifying state.
Register the Sg Data MCP server in PolicyLayer and add a rule for sg_weather_2h: 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 Sg Data. Nothing to install.
sg_weather_2h 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_weather_2h 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_weather_2h. 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_weather_2h is provided by the Sg Data MCP server (vdineshk/sg-data-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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