Check if a UK bicycle is reported stolen by serial number. Cyclesite aggregates lookups across UK stolen-bike databases — the unique data we own. Per-serial rate-limited (3/hour) to prevent enumeration. Example: 'is the bike with serial WTU123456 reported stolen?'. Live data — cross-references mu...
Risk signalsBulk/mass operation — affects multiple targets
Part of the Cyclesite Mcp Server server.
Free to start. No card required.
AI agents call check_stolen to retrieve information from Cyclesite Mcp Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though check_stolen only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"check_stolen": {}
}
}See the full Cyclesite Mcp Server policy for all 33 tools.
These attack patterns abuse exactly the kind of access check_stolen gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Check if a UK bicycle is reported stolen by serial number. Cyclesite aggregates lookups across UK stolen-bike databases — the unique data we own. Per-serial rate-limited (3/hour) to prevent enumeration. Example: 'is the bike with serial WTU123456 reported stolen?'. Live data — cross-references multiple registries on every call.. It is categorised as a Read tool in the Cyclesite Mcp Server MCP Server, which means it retrieves data without modifying state.
Register the Cyclesite Mcp Server MCP server in PolicyLayer and add a rule for check_stolen: 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.
check_stolen is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the check_stolen 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 check_stolen. 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.
check_stolen 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.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.