Set user access and refresh tokens with custom expiry times. This is an enhanced version of ebay_set_user_tokens that accepts expiry times and can automatically refresh the access token if it
AI agents use ebay_set_user_tokens_with_expiry 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.
This tool writes/modifies user authentication tokens, which are fundamental to account access and security. Misuse could allow an attacker to persist unauthorized access, hijack user sessions, or escalate privileges.
From the tool's definition Tool name 'ebay_set_user_tokens_with_expiry' and description 'Set user access and refresh tokens with custom expiry times' indicates this tool modifies authentication credentials.
Documented attack patterns abuse exactly the kind of access ebay_set_user_tokens_with_expiry 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_set_user_tokens_with_expiry:
{
"version": "1",
"default": "deny",
"tools": {
"ebay_set_user_tokens_with_expiry": {
"limits": [
{
"counter": "ebay_set_user_tokens_with_expiry_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ebay_set_user_tokens_with_expiry 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.
Set user access and refresh tokens with custom expiry times. This is an enhanced version of ebay_set_user_tokens that accepts expiry times and can automatically refresh the access token if it. 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_set_user_tokens_with_expiry: 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_set_user_tokens_with_expiry 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_set_user_tokens_with_expiry 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_set_user_tokens_with_expiry. 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_set_user_tokens_with_expiry 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.