AI agents call business_days 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 |
|---|---|---|---|
end_date | string | Yes | End date (YYYY-MM-DD) |
start_date | string | Yes | Start date (YYYY-MM-DD) |
Parameters from the server's own tool schema.
This is a deterministic mathematical/calculation tool that retrieves information (date arithmetic) without creating, modifying, deleting, or executing anything. It falls squarely into the Read category. Severity is low because misuse by an AI agent poses no risk: the worst outcome is an incorrect date calculation, which has no destructive or financial consequences.
From the tool's definition Tool description states 'Count business days between two dates' - a pure calculation/query operation with no modification of data, no execution of external code, and no side effects.
Attacks that exploit this kind of access
Count business days between two dates (excluding weekends). It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
business_days accepts 2 parameters: end_date, start_date. Required: end_date, start_date. 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 business_days: 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.
business_days 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 business_days 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 business_days. 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.
business_days 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.
business_days 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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