This record as markdown: /tools/io-tinyfn-tinyfn/geohash-decode.md
What geohash_decode does on TinyFn
AI agents call geohash_decode 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 |
|---|---|---|---|
geohash | string | Yes | Geohash string |
Parameters from the server's own tool schema.
Why geohash_decode is rated Low
This is a deterministic data transformation tool that reads a geohash input and returns corresponding latitude/longitude coordinates. It has no side effects, does not interact with external systems, and performs no destructive, financial, or code execution operations. It is analogous to other validation and conversion tools on the server (encoding, decoding, hashing).
From the tool's definition Tool name 'geohash_decode' and description 'Decode geohash to coordinates' indicate a retrieval operation that converts a geohash string into geographic coordinates. No data is modified, created, deleted, or persisted.
Attacks that exploit this kind of access
The rule that runs geohash_decode 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 geohash_decode, this is the rule to start with:
geohash_decode 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 geohash_decode call is checked against it from then on.
Questions about geohash_decode
Decode geohash to coordinates. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
geohash_decode accepts 1 parameter: geohash. Required: geohash. 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 geohash_decode: 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.
geohash_decode 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 geohash_decode 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 geohash_decode. 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.
geohash_decode 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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