Publish a Cyclesite listing on the user's behalf. Multi-step: first call (no draftId) returns a phone-friendly photo upload URL; once 3+ photos are uploaded, the next call returns either step:'live' (during launch promo, no fee) or step:'payment_required' with a Stripe Checkout URL for the £10.99...
Risk signalsHigh parameter count (15 properties)
Part of the Cyclesite Mcp Server server.
Free to start. No card required.
AI agents use publish_listing to create or modify resources in Cyclesite Mcp Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call publish_listing repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Cyclesite Mcp Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"publish_listing": {
"limits": [
{
"counter": "publish_listing_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Cyclesite Mcp Server policy for all 33 tools.
These attack patterns abuse exactly the kind of access publish_listing gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Publish a Cyclesite listing on the user's behalf. Multi-step: first call (no draftId) returns a phone-friendly photo upload URL; once 3+ photos are uploaded, the next call returns either step:'live' (during launch promo, no fee) or step:'payment_required' with a Stripe Checkout URL for the £10.99 listing fee. Idempotent — keep calling with the same draftId until step:'live'. Requires OAuth scope listings:publish. Example flow: user says 'sell my Trek Domane' → call publish_listing → assistant directs user to upload URL → user uploads → call again → step:'live' → seller receives a confirmation email with a 24h undo link.. It is categorised as a Write tool in the Cyclesite Mcp Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Cyclesite Mcp Server MCP server in PolicyLayer and add a rule for publish_listing: 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 Cyclesite Mcp Server. Nothing to install.
publish_listing 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 publish_listing 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 publish_listing. 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.
publish_listing is provided by the Cyclesite Mcp Server MCP server (cyclesite-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 33 Cyclesite Mcp Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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