AI agents call openaq_measurements to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | number | — | |
date_to | string | — | |
date_from | string | — | |
parameter | string | — | |
location_id | number | Yes |
Parameters from the server's own tool schema.
This tool performs a read-only query operation that retrieves environmental data from an external API. There are no side effects, data modifications, deletions, code execution, or financial implications. The primary function is to fetch and display air quality measurement data, making it a classic Read category tool.
From the tool's definition Tool retrieves air quality measurements from OpenAQ; description contains "Get" which indicates data retrieval with no stated modification or deletion capabilities.
Attacks that exploit this kind of access
Get air quality measurements from OpenAQ. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
openaq_measurements accepts 5 parameters: limit, date_to, date_from, parameter, location_id. Required: location_id. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for openaq_measurements: 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 UnClick. Nothing to install.
openaq_measurements 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 openaq_measurements 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 openaq_measurements. 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.
openaq_measurements is provided by the UnClick MCP server (@unclick/mcp-server). 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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