Get historical weather for a city on a past date. date must be in YYYY-MM-DD format.
AI agents call get_historical_weather to retrieve information from Weather 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 historical weather information without side effects. It queries existing data (past weather records) and returns results without modifying, deleting, or executing any operations. The only parameter is a date in YYYY-MM-DD format, making misuse unlikely to cause significant harm. This is a straightforward data retrieval operation, classified as Read with low severity.
From the tool's definition Tool name 'get_historical_weather' and description explicitly state it retrieves ('Get') historical weather data for a city on a past date.
Attacks that exploit this kind of access
Get historical weather for a city on a past date. date must be in YYYY-MM-DD format. It is categorised as a Read tool in the Weather MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Weather MCP Server MCP server in PolicyLayer and add a rule for get_historical_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 Weather MCP Server. Nothing to install.
get_historical_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_historical_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_historical_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_historical_weather is provided by the Weather MCP Server MCP server (shreyaschhabra/weather-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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