digital_root
Calculate the digital root (repeated digit sum until single digit).
This record as markdown: /tools/io-tinyfn-tinyfn/digital-root.md
What digital_root does on TinyFn
AI agents call digital_root to retrieve information from TinyFn 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 |
|---|---|---|---|
number | integer | Yes | Number to calculate digital root for |
Parameters from the server's own tool schema.
Why digital_root is rated Low
This is a deterministic mathematical utility that reads its numeric input and returns a computed value. No data is modified, created, deleted, or committed. No code execution or external side effects occur. It is purely computational and belongs in the Read category with low severity, as misuse poses minimal risk to systems or data.
From the tool's definition The tool 'digital_root' performs a pure mathematical computation (repeated digit sum until a single digit results). The description indicates no side effects, data persistence changes, or external operations—it calculates and returns a result.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
The rule that runs digital_root safely
PolicyLayer is an MCP gateway: it sits between your AI agents and TinyFn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For digital_root, this is the rule to start with:
digital_root 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 TinyFn, apply this rule, and every digital_root call is checked against it from then on.
Questions about digital_root
Calculate the digital root (repeated digit sum until single digit). It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
digital_root accepts 1 parameter: number. Required: number. The full parameter table on this page comes from the server's own tool schema.
Register the TinyFn MCP server in PolicyLayer and add a rule for digital_root: 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 TinyFn. Nothing to install.
digital_root 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 digital_root 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 digital_root. 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.
digital_root is provided by the TinyFn MCP server (https://api.tinyfn.io/mcp/all/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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