Creates a new example data item for the authenticated user. Demonstrates authenticated CRUD operations with input validation.
AI agents use createExampleData to create or update resources in MCP Authentication Demo — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Authentication Demo environment.
This tool creates new data items, which is a reversible write operation. It does not execute arbitrary code, delete data irreversibly, or move money. Medium severity accounts for potential misuse by an AI agent to create unauthorized or malicious data entries if authentication boundaries are bypassed, but the impact is limited to creating records that could typically be deleted or modified later.
From the tool's definition Tool description states 'Creates a new example data item' — the word 'Creates' indicates data modification without permanent deletion or financial impact. The tool is for 'authenticated CRUD operations', confirming it writes data.
Documented attack patterns abuse exactly the kind of access createExampleData gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Authentication Demo, and nothing reaches the server without passing your rules. This is the rule we recommend for createExampleData:
{
"version": "1",
"default": "deny",
"tools": {
"createExampleData": {
"limits": [
{
"counter": "createexampledata_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}createExampleData 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.
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Creates a new example data item for the authenticated user. Demonstrates authenticated CRUD operations with input validation. It is categorised as a Write tool in the MCP Authentication Demo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Authentication Demo MCP server in PolicyLayer and add a rule for createExampleData: 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 MCP Authentication Demo. Nothing to install.
createExampleData is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the createExampleData 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.
Set action: deny in the PolicyLayer policy for createExampleData. 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.
createExampleData is provided by the MCP Authentication Demo MCP server (workos/vercel-mcp-example). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Authentication Demo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
5 MCP Authentication Demo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.