FFT spectrum analysis
AI agents call analyze_spectrum to retrieve information from Filopastry without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
FFT (Fast Fourier Transform) spectrum analysis is a diagnostic operation that reads and processes audio data to extract frequency information. It produces no side effects, does not execute arbitrary code, does not modify or delete data, and does not involve financial operations. This is clearly a Read operation—analyzing audio characteristics for informational purposes only.
From the tool's definition Tool name 'analyze_spectrum' and description 'FFT spectrum analysis' indicate real-time audio analysis that retrieves spectral data without modification, creation, or deletion of audio or system state.
Attacks that exploit this kind of access
FFT spectrum analysis. It is categorised as a Read tool in the Filopastry MCP Server, which means it retrieves data without modifying state.
Register the Filopastry MCP server in PolicyLayer and add a rule for analyze_spectrum: 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 Filopastry. Nothing to install.
analyze_spectrum 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 analyze_spectrum 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 analyze_spectrum. 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.
analyze_spectrum is provided by the Filopastry MCP server (youwenshao/filopastry). 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.
Teams ship this data inside their own products. See what a licence covers →