This record as markdown: /tools/io-tinyfn-tinyfn/primes-in-range.md
What primes_in_range does on TinyFn
AI agents call primes_in_range 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 |
|---|---|---|---|
end | integer | Yes | End of range |
start | integer | Yes | Start of range |
Parameters from the server's own tool schema.
Why primes_in_range is rated Low
This is a pure mathematical computation function that retrieves information (prime numbers within specified bounds). It performs no writes, deletions, code execution, or resource modification. The tool is deterministic and read-only, making it the lowest risk category.
From the tool's definition Tool name 'primes_in_range' and description 'Get all prime numbers in a range' indicate a query/retrieval operation with no side effects. It computes and returns data without modifying, creating, deleting, executing external code, or affecting financial state.
Attacks that exploit this kind of access
The rule that runs primes_in_range 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 primes_in_range, this is the rule to start with:
primes_in_range 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 primes_in_range call is checked against it from then on.
Questions about primes_in_range
Get all prime numbers in a range. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
primes_in_range accepts 2 parameters: end, start. Required: end, start. 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 primes_in_range: 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.
primes_in_range 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 primes_in_range 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 primes_in_range. 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.
primes_in_range 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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