AI agents call fred_get_vintage_dates to retrieve information from Self without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to query historical data revision dates from the FRED API, which is a read-only operation with no side effects. The context of the FastMCP FRED server and similar sibling tools all perform retrieval/query functions. No capability to modify, delete, execute code, or move financial assets is evident. The empty description lowers confidence slightly, but the tooling context is clear.
From the tool's definition Tool name 'fred_get_vintage_dates' and context of sibling tools (fred_get_latest_observation, fred_get_observations, fred_get_series, fred_get_macro_snapshot, fred_get_canonical_indicators) all indicate data retrieval operations on FRED macroeconomic data.
Attacks that exploit this kind of access
fred_get_vintage_dates. It is categorised as a Read tool in the Self MCP Server, which means it retrieves data without modifying state.
Register the Self MCP server in PolicyLayer and add a rule for fred_get_vintage_dates: 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 Self. Nothing to install.
fred_get_vintage_dates 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 fred_get_vintage_dates 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 fred_get_vintage_dates. 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.
fred_get_vintage_dates is provided by the Self MCP server (ryanwang945/self-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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