Monthly Treasury Statement (MTS) — Table 4 federal receipts by source. Monthly + fiscal-year-to-date totals by classification (individual income tax, corporate income tax, social-insurance, excise, customs, estate-and-gift, misc).
AI agents call treasury.monthly-statement 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 tool queries and presents historical federal treasury receipt data organized by tax source and classification. It has no side effects — it does not create, modify, delete, or execute operations. While the data is financial in nature, the tool itself performs only read operations similar to accessing a public financial report or database query.
From the tool's definition Tool retrieves and reports 'Monthly Treasury Statement' data with 'Monthly + fiscal-year-to-date totals by classification' — pure data retrieval with no modification, deletion, execution, or financial transaction capability.
Attacks that exploit this kind of access
Monthly Treasury Statement (MTS) — Table 4 federal receipts by source. Monthly + fiscal-year-to-date totals by classification (individual income tax, corporate income tax, social-insurance, excise, customs, estate-and-gift, misc). 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 treasury.monthly-statement: 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.
treasury.monthly-statement 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 treasury.monthly-statement 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 treasury.monthly-statement. 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.
treasury.monthly-statement 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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