goertzel
Compute a single DFT frequency bin using the Goertzel algorithm.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/goertzel.md
What goertzel does on UnClick
AI agents invoke goertzel to trigger actions in UnClick. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
bin | number | Yes | Target frequency bin index (0 to N-1) |
samples | array | Yes | Array of real-valued samples |
Parameters from the server's own tool schema.
Why goertzel is rated High
The tool executes a signal processing algorithm (Goertzel) to compute a discrete Fourier transform frequency bin. This is a pure computation with no data persistence or side effects, but it executes a process rather than simply reading stored data. Severity is low since it only performs a math operation with no meaningful blast radius if misused.
From the tool's definition 'Compute a single DFT frequency bin using the Goertzel algorithm' — performs a mathematical computation/algorithm execution
Attacks that exploit this kind of access
The rule that runs goertzel safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For goertzel, this is the rule to start with:
goertzel stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every goertzel call is checked against it from then on.
Questions about goertzel
Compute a single DFT frequency bin using the Goertzel algorithm. It is categorised as a Execute tool in the UnClick MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
goertzel accepts 2 parameters: bin, samples. Required: bin, samples. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for goertzel: 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 UnClick. Nothing to install.
goertzel is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the goertzel 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 goertzel. 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.
goertzel is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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