Get all air quality monitors in a state. Returns detailed information about monitors including location, operational dates, and measurement parameters. Parameters: - param: 5-digit AQS parameter code for the pollutant. Common codes: - 44201: Ozone (O3) - 88101: PM2.5 (Fine Particulate Matter, Loc...
AI agents call aqs_monitors_by_state to retrieve information from EPA Air Quality System (AQS) MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure data retrieval tool that queries EPA air quality monitoring site information. It accepts filter parameters (pollutant code, date range, state) and returns descriptive data about air quality monitors. There are no side effects, no data modification, no code execution, and no financial operations. The tool belongs in the Read category as the lowest severity risk.
From the tool's definition Tool returns 'detailed information about monitors including location, operational dates, and measurement parameters' with parameters for filtering by pollutant type, date range, and state.
Attacks that exploit this kind of access
Get all air quality monitors in a state. Returns detailed information about monitors including location, operational dates, and measurement parameters. Parameters: - param: 5-digit AQS parameter code for the pollutant. Common codes: - 44201: Ozone (O3) - 88101: PM2.5 (Fine Particulate Matter, Local Conditions) - 81102: PM10 (Particulate Matter) - 42401: Sulfur Dioxide (SO2) - 42101: Carbon Monoxide (CO) - 42602: Nitrogen Dioxide (NO2) - bdate/edate: Begin and end dates in YYYYMMDD format (must be same calendar year) - state: 2-digit FIPS state code (e.g.,. It is categorised as a Read tool in the EPA Air Quality System (AQS) MCP Server MCP Server, which means it retrieves data without modifying state.
Register the EPA Air Quality System (AQS) MCP Server MCP server in PolicyLayer and add a rule for aqs_monitors_by_state: 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 EPA Air Quality System (AQS) MCP Server. Nothing to install.
aqs_monitors_by_state 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 aqs_monitors_by_state 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 aqs_monitors_by_state. 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.
aqs_monitors_by_state is provided by the EPA Air Quality System (AQS) MCP Server MCP server (tyson-swetnam/aqs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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