AI agents call is_even 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 |
|---|---|---|---|
number | integer | Yes | The number to check |
Parameters from the server's own tool schema.
This tool retrieves/queries a mathematical property of a number and returns the result with no side effects. It does not create, modify, delete, execute, or move resources. It is deterministic and safe, fitting the Read category (retrieves data/computes value without side effects).
From the tool's definition Tool name is 'is_even' and description states it 'Check[s] if a number is even.' This is a pure query operation that returns a boolean result based on input without modifying any state, creating side effects, or performing any actions beyond simple arithmetic…
Attacks that exploit this kind of access
Check if a number is even. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
is_even 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 is_even: 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.
is_even 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 is_even 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 is_even. 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.
is_even 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.
is_even 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.
Teams ship this data inside their own products. See what a licence covers →