ebay_set_user_tokens

SERVEREbay SOURCEyosefhayim/ebay-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/yosefhayim-ebay-mcp/ebay-set-user-tokens.md

WHAT IT DOES

What ebay_set_user_tokens does on Ebay

AI agents use ebay_set_user_tokens to create or update resources in Ebay, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ebay environment.

RISK

Why ebay_set_user_tokens is rated Medium

This tool writes OAuth tokens to disk storage, modifying persistent state. It is not destructive (no deletion), not financial (no money movement), but it does create/store credentials that grant authenticated access to eBay's Sell APIs. Misuse could allow an AI agent to store attacker-controlled tokens, effectively hijacking API authentication context.

From the tool's definition Set the user access token and refresh token for authenticated API requests. Tokens will be persisted to disk and automatically refreshed when needed.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ebay_set_user_tokens safely

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

ebay_set_user_tokens Rate-limited

ebay_set_user_tokens 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": {
    "ebay_set_user_tokens": {
      "limits": [
        {
          "counter": "ebay_set_user_tokens_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about ebay_set_user_tokens

What does the ebay_set_user_tokens tool do? +

Set the user access token and refresh token for authenticated API requests. These tokens should be obtained through the OAuth authorization code flow. Tokens will be persisted to disk and automatically refreshed when needed. User tokens provide higher rate limits (10,000-50,000 requests/day) compared to client credentials (1,000 requests/day). It is categorised as a Write tool in the Ebay MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ebay_set_user_tokens? +

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

What risk level is ebay_set_user_tokens? +

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

Can I rate-limit ebay_set_user_tokens? +

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

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

ebay_set_user_tokens is provided by the Ebay MCP server (yosefhayim/ebay-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Ebay, and thousands of servers like it.

This server

All 302 Ebay tools →

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Guides

Govern customer-ops agents →Argument validation →Scoped token →