getMedicationRequestById

THE RISK

Low Risk

Why getMedicationRequestById needs a policy

This tool performs data retrieval only—it queries and returns a medication request record by identifier. There is no creation, modification, deletion, code execution, or financial impact. The blast radius of misuse is limited to unauthorized viewing of healthcare data, which while sensitive, is less severe than write or destructive operations.

From the tool's definition Tool name 'getMedicationRequestById' and description 'Retrieves a medication request by its unique ID' indicate a read-only operation that fetches existing data without modification or side effects.

Documented attack patterns abuse exactly the kind of access getMedicationRequestById gives an agent:

POLICY

How to control getMedicationRequestById

PolicyLayer is an MCP gateway — it sits between your AI agents and Medplum MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for getMedicationRequestById:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "getMedicationRequestById": {}
  }
}

getMedicationRequestById is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Medplum MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Medplum MCP Server tools

Write createCondition Creates a new condition or diagnosis for a patient. Requires a patient ID and a condition Write createEncounter Creates a new encounter (patient visit). Requires patient ID and status. Write createEpisodeOfCare Creates a new episode of care for a patient. Requires patient ID and status. Write createMedication Creates a new medication resource. Requires medication code or identifier. Write createMedicationRequest Creates a new medication request (prescription). Requires patient ID, medication reference Write createObservation Creates a new observation (lab result, vital sign, etc.). Requires patient ID and code. Write createOrganization Creates a new organization (e.g., hospital, clinic). Requires organization name. Write createPatient Creates a new patient resource. Requires first name, last name, and birth date.

All 37 Medplum MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about getMedicationRequestById

What does the getMedicationRequestById tool do? +

Retrieves a medication request by its unique ID. It is categorised as a Read tool in the Medplum MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on getMedicationRequestById? +

Register the Medplum MCP Server MCP server in PolicyLayer and add a rule for getMedicationRequestById: 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 Medplum MCP Server. Nothing to install.

What risk level is getMedicationRequestById? +

getMedicationRequestById is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit getMedicationRequestById? +

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

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

getMedicationRequestById is provided by the Medplum MCP Server MCP server (rkirkendall/medplum-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Medplum MCP Server tool call.

Start from Medplum MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →