combination_calc
Calculate the number of combinations C(n,r) - unordered selections.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/combination-calc.md
What combination_calc does on UnClick
AI agents call combination_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 | Yes | Number of items to choose. |
Parameters from the server's own tool schema.
Why combination_calc is rated Low
This is a pure mathematical computation tool that retrieves a calculated result based on input parameters. It does not create, modify, delete, execute code, or trigger external operations. It falls squarely into the Read category as a query that returns a computed value with no side effects. Severity is low as misuse poses minimal risk.
From the tool's definition Tool performs a mathematical calculation of combinations C(n,r). The description indicates it 'Calculate[s] the number of combinations' with no mention of side effects, data modification, or external operations.
Attacks that exploit this kind of access
The rule that runs combination_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 combination_calc, this is the rule to start with:
combination_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 combination_calc call is checked against it from then on.
Questions about combination_calc
Calculate the number of combinations C(n,r) - unordered selections. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
combination_calc accepts 2 parameters: n, r. Required: n, r. 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 combination_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.
combination_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 combination_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 combination_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.
combination_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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