AI agents call hash_blake2s 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 |
|---|---|---|---|
text | string | Yes | Text to hash |
digest_size | integer | — | Digest size in bytes |
Parameters from the server's own tool schema.
Hashing is a read-only operation that computes a digest from input data. It does not create, modify, delete, or execute anything—it merely transforms input into a hash value. The tool is part of a collection of '500+ deterministic tools' designed for data processing without side effects. BLAKE2s is a pure cryptographic hash function with no mutable operations.
From the tool's definition Tool name 'hash_blake2s' and description 'Generate BLAKE2s hash of text' indicate a deterministic cryptographic hashing function that produces output from input without side effects, state changes, or data modification.
Attacks that exploit this kind of access
Generate BLAKE2s hash of text. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
hash_blake2s accepts 2 parameters: text, digest_size. Required: text. 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 hash_blake2s: 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.
hash_blake2s 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 hash_blake2s 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 hash_blake2s. 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.
hash_blake2s 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.
hash_blake2s 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.
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