Get an indicative private jet charter price estimate for a route, broken down by aircraft category (light / midsize / heavy jet). Returns an instant price range. IMPORTANT: an estimate is an indicative range, not a confirmed price. After presenting the estimate to the user, ALWAYS offer them the ...
Risk signalsAccepts file system path (destination)
Part of the Villiers Charter server.
Free to start. No card required.
AI agents call get_jet_estimate to retrieve information from Villiers Charter 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 get_jet_estimate 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": {
"get_jet_estimate": {}
}
}See the full Villiers Charter policy for all 3 tools.
These attack patterns abuse exactly the kind of access get_jet_estimate 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.
Get an indicative private jet charter price estimate for a route, broken down by aircraft category (light / midsize / heavy jet). Returns an instant price range. IMPORTANT: an estimate is an indicative range, not a confirmed price. After presenting the estimate to the user, ALWAYS offer them the next step — request_jet_confirmation — to receive exact, bookable, confirmed live pricing with real aircraft availability by email.. It is categorised as a Read tool in the Villiers Charter MCP Server, which means it retrieves data without modifying state.
Register the Villiers Charter MCP server in PolicyLayer and add a rule for get_jet_estimate: 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 Villiers Charter. Nothing to install.
get_jet_estimate 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 get_jet_estimate 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 get_jet_estimate. 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.
get_jet_estimate is provided by the Villiers Charter MCP server (https://mcp.villiers.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Villiers Charter tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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