permutation_calc
Calculate the number of permutations P(n,r) - ordered arrangements.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/permutation-calc.md
What permutation_calc does on UnClick
AI agents call permutation_calc 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 |
|---|---|---|---|
n | number | Yes | Total number of items. |
r | number | — | Number of items to arrange (defaults to n). |
Parameters from the server's own tool schema.
Why permutation_calc is rated Low
This tool performs a read-only mathematical calculation. It takes numeric inputs (n and r values) and returns a computed result (permutation count). There is no data modification, code execution, deletion, or financial impact. The operation is deterministic and has no external side effects, fitting the Read category's profile of retrieving computed data with no modifications.
From the tool's definition Tool description states 'Calculate the number of permutations P(n,r)' - a pure mathematical computation that retrieves a calculated result without side effects.
Attacks that exploit this kind of access
The rule that runs permutation_calc 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 permutation_calc, this is the rule to start with:
permutation_calc 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 permutation_calc call is checked against it from then on.
Questions about permutation_calc
Calculate the number of permutations P(n,r) - ordered arrangements. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
permutation_calc accepts 2 parameters: n, r. Required: n. 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 permutation_calc: 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.
permutation_calc 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 permutation_calc 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 permutation_calc. 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.
permutation_calc 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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