place_bid

A financial tool on the Ebay MCP server.

SERVEREbay SOURCEacato/ebay-mcp

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/acato-ebay-mcp/place-bid.md

WHAT IT DOES

What place_bid does on Ebay

AI agents use place_bid to commit financial operations through Ebay, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why place_bid is rated Critical

Placing a bid on eBay is a legally binding financial obligation. If accepted or if the bid wins, the user is committed to purchasing the item at that price. The server context (eBay buyer-side workflows with buy, bid, and offer tools) strongly confirms this is a financial action. The empty description lowers confidence slightly, but the tool name and server context make the classification clear.

From the tool's definition Tool name 'place_bid' on an eBay server with sibling tools including 'buy_now', 'make_best_offer', and 'get_active_bids' — bidding on eBay constitutes a binding financial commitment.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs place_bid 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 place_bid, this is the rule to start with:

place_bid Approval-gated

Any call to place_bid is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "place_bid": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about place_bid

What does the place_bid tool do? +

place_bid is a financial tool on the Ebay MCP server. It is categorised as a Financial tool in the Ebay MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on place_bid? +

Register the Ebay MCP server in PolicyLayer and add a rule for place_bid: 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 place_bid? +

place_bid is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit place_bid? +

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

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

place_bid is provided by the Ebay MCP server (acato/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 15 Ebay tools → Critical-risk tools on this server →

Across the catalogue

xlayer_place_bet on ScoutAgent →place_limit_order on Lighter MCP →place_order on MCP MetaTrader 4 Server →place_order on A2a Demos → All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →