AI agents call percentage to retrieve information from TinyFn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
total | number | Yes | The total |
value | number | Yes | The value |
Parameters from the server's own tool schema.
This is a deterministic mathematical utility that takes inputs and returns a calculated result. It does not read external data, modify any state, execute arbitrary code, delete anything, or commit financial transactions. It is a simple arithmetic operation suitable for AI agents with minimal risk if misused—any output would simply be an incorrect percentage calculation with no external impact.
From the tool's definition Tool name 'percentage' and description 'Calculate what percentage value is of total' indicate a pure computation function that retrieves no data from external systems, creates no persistent state, and performs no side effects.
Attacks that exploit this kind of access
Calculate what percentage value is of total. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
percentage accepts 2 parameters: total, value. Required: total, value. 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 percentage: 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.
percentage 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 percentage 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 percentage. 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.
percentage 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.
percentage is one line of TinyFn's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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