Send an enquiry to a Cyclesite seller on the buyer's behalf — Cyclesite becomes the messaging layer for the AI conversation. Per-buyer-per-listing daily cap (2/day) prevents spam. The seller is emailed; the buyer's reply appears via get_my_enquiries. Requires OAuth scope enquiries:respond (note: ...
Part of the Cyclesite The UKs Trusted bike marketplace server.
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AI agents use make_enquiry to create or modify resources in Cyclesite The UKs Trusted bike marketplace. 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 make_enquiry 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 The UKs Trusted bike marketplace.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"make_enquiry": {
"limits": [
{
"counter": "make_enquiry_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Cyclesite The UKs Trusted bike marketplace policy for all 31 tools.
These attack patterns abuse exactly the kind of access make_enquiry 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.
Send an enquiry to a Cyclesite seller on the buyer's behalf — Cyclesite becomes the messaging layer for the AI conversation. Per-buyer-per-listing daily cap (2/day) prevents spam. The seller is emailed; the buyer's reply appears via get_my_enquiries. Requires OAuth scope enquiries:respond (note: the scope name is shared with seller-side replies). Example: 'message the seller of that Trek and ask if they'd take £1,400 collection only in Manchester next Saturday'.. It is categorised as a Write tool in the Cyclesite The UKs Trusted bike marketplace MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Cyclesite The UKs Trusted bike marketplace MCP server in PolicyLayer and add a rule for make_enquiry: 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 The UKs Trusted bike marketplace. Nothing to install.
make_enquiry 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 make_enquiry 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 make_enquiry. 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.
make_enquiry is provided by the Cyclesite The UKs Trusted bike marketplace MCP server (cyclesite/bikes). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 31 Cyclesite The UKs Trusted bike marketplace tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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