save_lesson_draft · Metis Public Health MCP: Risk & Policy

WHAT IT DOES

What save_lesson_draft does on Metis Public Health

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

WHY IT NEEDS A POLICY

Why save_lesson_draft needs a policy

The tool performs a write operation by saving lesson content, which modifies local state (creating or updating a draft). This is reversible and non-destructive. Severity is medium because drafts can be edited or deleted, and the blast radius of an agent unintentionally saving incorrect lesson content to the user's local system is moderate.

From the tool's definition Tool name 'save_lesson_draft' indicates it writes/persists lesson content. The verb 'save' combined with 'draft' suggests creating or modifying a draft document. The description is empty, limiting certainty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_lesson_draft Rate-limited

save_lesson_draft 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": {
    "save_lesson_draft": {
      "limits": [
        {
          "counter": "save_lesson_draft_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 Metis Public Health, so you can run agents against it safely.

FAQ

Questions about save_lesson_draft

What does the save_lesson_draft tool do? +

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

How do I enforce a policy on save_lesson_draft? +

Register the Metis Public Health MCP server in PolicyLayer and add a rule for save_lesson_draft: 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 Metis Public Health. Nothing to install.

What risk level is save_lesson_draft? +

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

Can I rate-limit save_lesson_draft? +

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

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

save_lesson_draft is provided by the Metis Public Health MCP server (sveritg/metis_ph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.