retrieveKeyWithId

Retrieves the key for the given Id.

SERVERFusionauth SOURCE@fusionauth/mcp-api

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-fusionauth-mcp-api/retrievekeywithid.md

WHAT IT DOES

What retrieveKeyWithId does on Fusionauth

AI agents call retrieveKeyWithId to retrieve information from Fusionauth without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why retrieveKeyWithId is rated Low

This tool performs a read-only operation that retrieves existing data (a key) without creating, modifying, deleting, or executing any action. The use of 'Retrieves' in the description confirms no state change occurs. In the context of FusionAuth API operations, retrieving a key is a standard read operation with minimal blast radius.

From the tool's definition Tool name 'retrieveKeyWithId' and description 'Retrieves the key for the given Id' indicate a query/retrieval operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs retrieveKeyWithId safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Fusionauth, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For retrieveKeyWithId, this is the rule to start with:

retrieveKeyWithId Allowed

retrieveKeyWithId is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Fusionauth, apply this rule, and every retrieveKeyWithId call is checked against it from then on.

FAQ

Questions about retrieveKeyWithId

What does the retrieveKeyWithId tool do? +

Retrieves the key for the given Id. It is categorised as a Read tool in the Fusionauth MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on retrieveKeyWithId? +

Register the Fusionauth MCP server in PolicyLayer and add a rule for retrieveKeyWithId: 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 Fusionauth. Nothing to install.

What risk level is retrieveKeyWithId? +

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

Can I rate-limit retrieveKeyWithId? +

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

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

retrieveKeyWithId is provided by the Fusionauth MCP server (@fusionauth/mcp-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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