spike_generate_adr · Hedgehog MCP: Risk & Policy

WHAT IT DOES

What spike_generate_adr does on Hedgehog

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

WHY IT NEEDS A POLICY

Why spike_generate_adr needs a policy

ADR generation creates new documents in a persistent system, modifying the state of the technical spike investigation. This is a Write operation—it produces new data structures that persist. Severity is medium because ADRs guide architecture decisions but don't directly execute code, delete data, or move funds.

From the tool's definition Tool name 'spike_generate_adr' suggests generating Architecture Decision Records (ADRs). The server description indicates it 'generates Architecture Decision Records through an enforced four-phase workflow' and 'maintain[s] persistent state.' The tool…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spike_generate_adr Rate-limited

spike_generate_adr 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": {
    "spike_generate_adr": {
      "limits": [
        {
          "counter": "spike_generate_adr_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Hedgehog, so you can run agents against it safely.

FAQ

Questions about spike_generate_adr

What does the spike_generate_adr tool do? +

spike_generate_adr. It is categorised as a Write tool in the Hedgehog MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on spike_generate_adr? +

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

What risk level is spike_generate_adr? +

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

Can I rate-limit spike_generate_adr? +

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

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

spike_generate_adr is provided by the Hedgehog MCP server (jpalmerr/hedgehog). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.