toggle_context · Metis Public Health MCP: Risk & Policy

WHAT IT DOES

What toggle_context does on Metis Public Health

AI agents use toggle_context 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 toggle_context needs a policy

The tool modifies the state of a specialist context by toggling it on or off. This is a reversible write operation (it can be toggled back), affecting system configuration rather than data. Misuse could disrupt agent routing or research workflows, warranting medium severity.

From the tool's definition Activate or deactivate a specialist context

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_context Rate-limited

toggle_context 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": {
    "toggle_context": {
      "limits": [
        {
          "counter": "toggle_context_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 toggle_context

What does the toggle_context tool do? +

Activate or deactivate a specialist context. 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 toggle_context? +

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

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

Can I rate-limit toggle_context? +

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

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

toggle_context 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.