This record as markdown: /tools/io-tinyfn-tinyfn/get-quarter.md
What get_quarter does on TinyFn
AI agents call get_quarter 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 |
|---|---|---|---|
datetime_str | string | Yes | Datetime in ISO format |
Parameters from the server's own tool schema.
Why get_quarter is rated Low
This is a deterministic utility function that queries and returns computed information about a date (which quarter it falls in). It performs no writes, deletions, code execution, or financial operations. The low severity reflects minimal security impact even if misused by an agent—incorrect quarter information cannot cause harm.
From the tool's definition Tool name 'get_quarter' and description 'Get the quarter for a date' indicate a read-only operation that retrieves date information without modifying, executing code, or causing side effects.
Attacks that exploit this kind of access
The rule that runs get_quarter 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 get_quarter, this is the rule to start with:
get_quarter 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 get_quarter call is checked against it from then on.
Questions about get_quarter
Get the quarter for a date. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
get_quarter accepts 1 parameter: datetime_str. Required: datetime_str. 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 get_quarter: 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.
get_quarter 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 get_quarter 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 get_quarter. 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.
get_quarter 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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