reqsign_generate_hmac

Generate HMAC request signing

SERVERPlugin Hub SOURCE@barnburner121/plugin-hub-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/barnburner121-plugin-hub-mcp/reqsign-generate-hmac.md

WHAT IT DOES

What reqsign_generate_hmac does on Plugin Hub

AI agents use reqsign_generate_hmac to create or update resources in Plugin Hub, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Plugin Hub environment.

RISK

Why reqsign_generate_hmac is rated Medium

An AI agent can call reqsign_generate_hmac faster than any human can review: one bad instruction and it creates or modifies resources in Plugin Hub by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs reqsign_generate_hmac safely

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

reqsign_generate_hmac Rate-limited

reqsign_generate_hmac stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "reqsign_generate_hmac": {
      "limits": [
        {
          "counter": "reqsign_generate_hmac_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about reqsign_generate_hmac

What does the reqsign_generate_hmac tool do? +

Generate HMAC request signing. It is categorised as a Write tool in the Plugin Hub MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on reqsign_generate_hmac? +

Register the Plugin Hub MCP server in PolicyLayer and add a rule for reqsign_generate_hmac: 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 Plugin Hub. Nothing to install.

What risk level is reqsign_generate_hmac? +

reqsign_generate_hmac is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit reqsign_generate_hmac? +

Yes. Add a rate_limit block to the reqsign_generate_hmac 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 reqsign_generate_hmac completely? +

Set action: deny in the PolicyLayer policy for reqsign_generate_hmac. 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 reqsign_generate_hmac? +

reqsign_generate_hmac is provided by the Plugin Hub MCP server (@barnburner121/plugin-hub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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