AI agents call get-weather to retrieve information from Basic without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves/queries current weather data for a specified location. It performs a read-only data retrieval operation without creating, modifying, deleting, or executing any code. The input parameters (city name or coordinates) simply specify what data to retrieve. This is a classic Read category operation with minimal security risk.
From the tool's definition Tool description: "Get current weather conditions for a location." This is a retrieval operation that queries weather data with no side effects, modifications, or external state changes.
Attacks that exploit this kind of access
Get current weather conditions for a location. Provide either a city name OR latitude+longitude coordinates. It is categorised as a Read tool in the Basic MCP Server, which means it retrieves data without modifying state.
Register the Basic MCP server in PolicyLayer and add a rule for get-weather: 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 Basic. Nothing to install.
get-weather 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-weather 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-weather. 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-weather is provided by the Basic MCP server (tchoupoguy/basic-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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