This record as markdown: /tools/io-tinyfn-tinyfn/count-digits.md
What count_digits does on TinyFn
AI agents call count_digits 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 | integer | Yes | Number to count digits |
Parameters from the server's own tool schema.
Why count_digits is rated Low
The tool performs a simple analysis/query of input data to return a count—a read-only operation with no side effects, no data modification, and no risk of unintended consequences. It falls squarely into the Read category for data retrieval and analysis operations.
From the tool's definition Tool name and description indicate a purely computational operation: 'Count the number of digits.' This retrieves a numeric property from input without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
The rule that runs count_digits 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 count_digits, this is the rule to start with:
count_digits 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 count_digits call is checked against it from then on.
Questions about count_digits
Count the number of digits. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
count_digits 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 count_digits: 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_digits 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_digits 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_digits. 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_digits 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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