AI agents call count_items 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 |
|---|---|---|---|
items | string | Yes | Comma-separated items |
Parameters from the server's own tool schema.
This is a deterministic utility function that performs a statistical count on provided data. It retrieves and queries information without creating, modifying, deleting, or executing operations. The tool has no capability to affect external systems or cause irreversible changes, making it a safe Read operation with minimal blast radius.
From the tool's definition Tool name is 'count_items' and description states 'Count occurrences of each item' — a pure counting/analysis operation with no data mutation, external side effects, or code execution.
Attacks that exploit this kind of access
Count occurrences of each item. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
count_items accepts 1 parameter: items. Required: items. 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 count_items: 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.
count_items 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 count_items 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 count_items. 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.
count_items 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.
count_items 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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