AI agents call sun_position 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 |
|---|---|---|---|
day | integer | Yes | Day |
lat | number | Yes | Latitude |
lon | number | Yes | Longitude |
hour | integer | — | Hour (24h format) |
year | integer | Yes | Year |
month | integer | Yes | Month |
Parameters from the server's own tool schema.
The tool retrieves astronomical data (sun position) based on input parameters. It performs a deterministic calculation and returns results without creating, modifying, deleting, or executing anything external. This is a classic Read category tool — it queries/calculates information with no operational side effects.
From the tool's definition Tool name is 'sun_position' and description states it 'Calculate[s] approximate sun position (azimuth and elevation)'. This is a pure calculation/query operation with no side effects, no data modification, and no external state changes.
Attacks that exploit this kind of access
Calculate approximate sun position (azimuth and elevation). It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
sun_position accepts 6 parameters: day, lat, lon, hour, year, month. Required: day, lat, lon, year, month. 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 sun_position: 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.
sun_position 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 sun_position 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 sun_position. 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.
sun_position 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.
sun_position 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.
Teams ship this data inside their own products. See what a licence covers →