AI agents call sha1_checksum 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 |
Parameters from the server's own tool schema.
SHA1 checksums are deterministic, one-way hash functions used for verification and integrity checking. They produce output based on input without side effects, state changes, or external operations. This fits the 'Read' category as it retrieves/computes a derived value from data.
From the tool's definition Tool name: 'sha1_checksum'; description: 'Generate SHA1 checksum.' This is a pure cryptographic hashing function that computes and returns a digest of input data without modifying, executing, or deleting anything.
Attacks that exploit this kind of access
Generate SHA1 checksum. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
sha1_checksum accepts 1 parameter: text. 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 sha1_checksum: 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.
sha1_checksum 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 sha1_checksum 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 sha1_checksum. 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.
sha1_checksum 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.
sha1_checksum 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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