AI agents call get_json_path 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 |
|---|---|---|---|
path | string | Yes | Path to extract (e.g., 'user.address.city' or 'items[0].name') |
json_string | string | Yes | JSON string |
Parameters from the server's own tool schema.
This tool performs data extraction only. It queries JSON structures and returns values without creating, modifying, deleting, executing code, or moving money. The operation is read-only with no side effects, consistent with similar data retrieval tools in a utility library (alongside validation, conversion, and hashing functions).
From the tool's definition Tool description states 'Extract a value from JSON using a path expression' - a retrieval operation with no modification of data.
Risk signalsAccepts file system path (path)
Attacks that exploit this kind of access
Extract a value from JSON using a path expression. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
get_json_path accepts 2 parameters: path, json_string. Required: path, json_string. 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_json_path: 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_json_path 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_json_path 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_json_path. 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_json_path 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.
get_json_path 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 →