attest · Governance MCP: Risk & Policy

WHAT IT DOES

What attest does on Governance Mcp

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

WHY IT NEEDS A POLICY

Why attest needs a policy

This tool writes/creates a compliance evidence record into a governance ledger. It is a Write operation (creating data in an audit/compliance system). Severity is high because falsely attesting or misattesting compliance evidence in a regulatory governance ledger (EU AI Act, ISO 42001, SOC 2, NIST AI RMF) could have serious legal and regulatory consequences, and misuse by an AI agent could corrupt audit trails.

From the tool's definition 'Record a compliance evidence event in the Mima governance ledger' — creates a new entry in the governance ledger

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attest Rate-limited

attest 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": {
    "attest": {
      "limits": [
        {
          "counter": "attest_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about attest

What does the attest tool do? +

Record a compliance evidence event in the Mima governance ledger, mapped to. It is categorised as a Write tool in the Governance Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on attest? +

Register the Governance MCP server in PolicyLayer and add a rule for attest: 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 Governance Mcp. Nothing to install.

What risk level is attest? +

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

Can I rate-limit attest? +

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

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

attest is provided by the Governance MCP server (@mima-ai/governance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.