zscore_calculate
Calculate z-score, cumulative probability, and percentile for a value given mean and standard deviation.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/zscore-calculate.md
What zscore_calculate does on UnClick
AI agents call zscore_calculate to retrieve information from UnClick without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
mean | number | Yes | Population mean. |
value | number | Yes | The observed value. |
stddev | number | Yes | Population standard deviation (positive). |
Parameters from the server's own tool schema.
Why zscore_calculate is rated Low
This is a mathematical computation tool that retrieves derived statistics from provided inputs (value, mean, standard deviation). It performs read-only calculations without modifying any data, executing code, or triggering external systems. The blast radius of misuse is minimal—incorrect statistical outputs cause no damage beyond computational errors.
From the tool's definition Tool description states it 'Calculate[s] z-score, cumulative probability, and percentile' — pure statistical computation with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
The rule that runs zscore_calculate 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 zscore_calculate, this is the rule to start with:
zscore_calculate is read-only, so it stays allowed. 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 zscore_calculate call is checked against it from then on.
Questions about zscore_calculate
Calculate z-score, cumulative probability, and percentile for a value given mean and standard deviation. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
zscore_calculate accepts 3 parameters: mean, value, stddev. Required: mean, value, stddev. 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 zscore_calculate: 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.
zscore_calculate 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 zscore_calculate 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 zscore_calculate. 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.
zscore_calculate 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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