This record as markdown: /tools/io-tinyfn-tinyfn/is-integer.md
What is_integer does on TinyFn
AI agents call is_integer 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 | number | Yes | The number to check |
Parameters from the server's own tool schema.
Why is_integer is rated Low
This is a deterministic validation tool that inspects a numeric input and returns a boolean result. It retrieves or queries the nature of data without modifying, executing external code, destroying data, or moving money. It falls squarely in the Read category as a safe informational check.
From the tool's definition Tool name 'is_integer' and description 'Check if a number is an integer' indicate a pure validation/check operation with no side effects, no state modification, and no external operations triggered.
Attacks that exploit this kind of access
The rule that runs is_integer 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 is_integer, this is the rule to start with:
is_integer 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 is_integer call is checked against it from then on.
Questions about is_integer
Check if a number is an integer. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
is_integer 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_integer: 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_integer 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_integer 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_integer. 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_integer 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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