US Bureau of Labor Statistics time-series data. seriesIds = comma-separated BLS series IDs (1-10 per call), optional startYear + endYear (max 10 years). Common: LNS14000000 (unemployment), CUUR0000SA0 (CPI-U), CES0000000001 (nonfarm employment).
AI agents call bls.series to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a data retrieval tool with no side effects. It queries public BLS data and returns results based on input parameters. No write, execute, destructive, or financial operations are performed. The tool only reads and returns existing statistical data.
From the tool's definition Tool retrieves time-series data from US Bureau of Labor Statistics with parameters seriesIds, startYear, and endYear. No modification, deletion, or execution capability described. Returns historical economic statistics.
Attacks that exploit this kind of access
US Bureau of Labor Statistics time-series data. seriesIds = comma-separated BLS series IDs (1-10 per call), optional startYear + endYear (max 10 years). Common: LNS14000000 (unemployment), CUUR0000SA0 (CPI-U), CES0000000001 (nonfarm employment). It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for bls.series: 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 Mcp. Nothing to install.
bls.series 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 bls.series 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 bls.series. 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.
bls.series is provided by the MCP server (@2sio/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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