dhis2_query · Metis Public Health MCP: Risk & Policy

WHAT IT DOES

What dhis2_query does on Metis Public Health

AI agents invoke dhis2_query to trigger actions in Metis Public Health. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why dhis2_query needs a policy

DHIS2 is a health information management platform. A 'query' tool could range from read-only data retrieval to executing arbitrary queries that may modify or extract sensitive health data. Given the public health server context and the potential for handling sensitive patient/population health data, the severity is elevated.

From the tool's definition Tool name 'dhis2_query' suggests querying a DHIS2 (District Health Information Software 2) system. Description is empty, providing no further detail.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

dhis2_query Rate-limited

dhis2_query stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "dhis2_query": {
      "limits": [
        {
          "counter": "dhis2_query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 dhis2_query

What does the dhis2_query tool do? +

dhis2_query. It is categorised as a Execute tool in the Metis Public Health MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on dhis2_query? +

Register the Metis Public Health MCP server in PolicyLayer and add a rule for dhis2_query: 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 dhis2_query? +

dhis2_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit dhis2_query? +

Yes. Add a rate_limit block to the dhis2_query 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 dhis2_query completely? +

Set action: deny in the PolicyLayer policy for dhis2_query. 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 dhis2_query? +

dhis2_query 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.