reject_proposal · Metis Public Health MCP: Risk & Policy

WHAT IT DOES

What reject_proposal does on Metis Public Health

AI agents use reject_proposal 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 reject_proposal needs a policy

Based on naming convention and context of sibling tools (add_*, apply_proposal), this tool likely modifies proposal records in a reversible manner. Without an explicit description, confidence is reduced, but the 'reject' action implies state change rather than deletion (which would be Destructive) or mere querying (which would be Read).

From the tool's definition Tool name 'reject_proposal' suggests modifying the state of a proposal object (marking it as rejected), which is a reversible write operation. The description is empty, limiting certainty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reject_proposal Rate-limited

reject_proposal 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": {
    "reject_proposal": {
      "limits": [
        {
          "counter": "reject_proposal_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 reject_proposal

What does the reject_proposal tool do? +

reject_proposal. 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 reject_proposal? +

Register the Metis Public Health MCP server in PolicyLayer and add a rule for reject_proposal: 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 reject_proposal? +

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

Can I rate-limit reject_proposal? +

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

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

reject_proposal 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.