Manually refresh the user access token using the stored refresh token. This is useful when you want to proactively refresh an access token before it expires, or when recovering from authentication errors. Requires that user tokens are already set (either via EBAY_USER_REFRESH_TOKEN in .env or via...
AI agents use ebay_refresh_access_token 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.
An AI agent can call ebay_refresh_access_token faster than any human can review — one bad instruction and it creates or modifies resources in Ebay by the hundred, each call as confident as the last.
Documented attack patterns abuse exactly the kind of access ebay_refresh_access_token gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ebay, and nothing reaches the server without passing your rules. This is the rule we recommend for ebay_refresh_access_token:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_refresh_access_token": {
"limits": [
{
"counter": "ebay_refresh_access_token_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ebay_refresh_access_token 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.
Free to start. No card required.
Manually refresh the user access token using the stored refresh token. This is useful when you want to proactively refresh an access token before it expires, or when recovering from authentication errors. Requires that user tokens are already set (either via EBAY_USER_REFRESH_TOKEN in .env or via ebay_set_user_tokens_with_expiry). Returns the new access token and expiry time. 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.
Register the Ebay MCP server in PolicyLayer and add a rule for ebay_refresh_access_token: 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.
ebay_refresh_access_token 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 ebay_refresh_access_token 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 ebay_refresh_access_token. 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.
ebay_refresh_access_token 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.
Deterministic rules across all 332 Ebay tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
332 Ebay tools catalogued and risk-classified — across an index of 42,500+ MCP servers.