ebay_send_message

Send a direct message to a buyer regarding a specific transaction or inquiry. Use this to communicate about orders, answer questions, resolve issues, or provide updates.

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-send-message.md

WHAT IT DOES

What ebay_send_message does on Ebay

AI agents use ebay_send_message 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_send_message is rated Medium

Sending a message creates new data (message records) in eBay's system and modifies the communication history between seller and buyer. This is a reversible write operation (messages can be deleted or retracted in most systems). While it has side effects, it does not execute arbitrary code, delete data irreversibly, or move money, so Write is the appropriate category.

From the tool's definition Tool name 'ebay_send_message' and description states it will 'Send a direct message to a buyer' - this creates/modifies communication data in eBay's system.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

ebay_send_message Rate-limited

ebay_send_message 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_send_message": {
      "limits": [
        {
          "counter": "ebay_send_message_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_send_message call is checked against it from then on.

FAQ

Questions about ebay_send_message

What does the ebay_send_message tool do? +

Send a direct message to a buyer regarding a specific transaction or inquiry. Use this to communicate about orders, answer questions, resolve issues, or provide updates. 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_send_message? +

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

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

Can I rate-limit ebay_send_message? +

Yes. Add a rate_limit block to the ebay_send_message 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_send_message completely? +

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

ebay_send_message 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.

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