Get air quality data for a specific city.
AI agents call city_aqi to retrieve information from AQICN 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 air quality information for a specified city without creating, modifying, deleting, or executing any operations. It is a straightforward query operation with no side effects, making it a Read category risk. Severity is low because misuse would only result in excessive data requests, not system compromise or data loss.
From the tool's definition Tool name 'city_aqi' and description 'Get air quality data for a specific city' indicate data retrieval with no modification. The verb 'Get' and context of fetching 'real-time air quality data' confirm read-only operation.
Attacks that exploit this kind of access
Get air quality data for a specific city. It is categorised as a Read tool in the AQICN MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AQICN MCP Server MCP server in PolicyLayer and add a rule for city_aqi: 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 AQICN MCP Server. Nothing to install.
city_aqi 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 city_aqi 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 city_aqi. 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.
city_aqi is provided by the AQICN MCP Server MCP server (mattmarcin/aqicn-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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