sun_position
Calculate approximate sun position (azimuth and elevation).
This record as markdown: /tools/io-tinyfn-tinyfn/sun-position.md
What sun_position does on TinyFn
AI agents call sun_position 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 |
|---|---|---|---|
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.
Why sun_position is rated Low
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
The rule that runs sun_position 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 sun_position, this is the rule to start with:
sun_position 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 sun_position call is checked against it from then on.
Questions about sun_position
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.
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