hash

MD5/SHA/HMAC/UUID/random tokens (250 sats/call; free tier 100 calls/mo)

SERVERHyperion SOURCEhttps://hyperion.thetempleofdoom.com/mcp

Low RISK CLASS

Category Read

Parameters 31 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-thetempleofdoom-hyperion-hyperion/hash.md

WHAT IT DOES

What hash does on Hyperion

AI agents call hash to retrieve information from Hyperion 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
`input`	string	—	Source text string to hash or sign.
`algorithm`	string	Yes	Hash or ID generator type.
`secretKey`	string	—	Optional key for HMAC generation.

Parameters from the server's own tool schema.

RISK

Why hash is rated Low

Even though hash only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs hash safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hyperion, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hash, this is the rule to start with:

hash Allowed

hash is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hash": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hyperion, apply this rule, and every hash call is checked against it from then on.

FAQ

Questions about hash

What does the hash tool do? +

MD5/SHA/HMAC/UUID/random tokens (250 sats/call; free tier 100 calls/mo). It is categorised as a Read tool in the Hyperion MCP Server, which means it retrieves data without modifying state.

What parameters does hash accept? +

hash accepts 3 parameters: input, algorithm, secretKey. Required: algorithm. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on hash? +

Register the Hyperion MCP server in PolicyLayer and add a rule for hash: 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 Hyperion. Nothing to install.

What risk level is hash? +

hash is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit hash? +

Yes. Add a rate_limit block to the hash 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.

How do I block hash completely? +

Set action: deny in the PolicyLayer policy for hash. 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.

What MCP server provides hash? +

hash is provided by the Hyperion MCP server (https://hyperion.thetempleofdoom.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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