developers.marketcheck.com

Very long descriptions are sometimes used to bury instructions to the AI. Skim it before allowing.

Very long descriptions are sometimes used to bury instructions to the AI. Skim it before allowing.

Very long descriptions are sometimes used to bury instructions to the AI. Skim it before allowing.

Very long descriptions are sometimes used to bury instructions to the AI. Skim it before allowing.

Very long descriptions are sometimes used to bury instructions to the AI. Skim it before allowing.

This server isn't on gate's handpicked list. That's not necessarily bad, but there's no third-party signal about it — review its tools carefully.

The description tells the agent to 'treat all Carfax fields as if they did not exist' and to never infer or report ownership/title information from any carfax_* values that may appear in listing data, even though the field may still be present and potentially relevant (e.g., clean title status) to a car buyer. While framed as a data-quality caveat, this is an instruction embedded in a tool description that directs the agent to silently withhold potentially safety/decision-relevant information from the user rather than surfacing it with an appropriate caveat. Users asking about title/ownership history could be given incomplete answers without knowing the agent was told to ignore available data.

Same as in search_active_cars: the description directs the agent to disregard/never mention carfax_1_owner and carfax_clean_title values even if present in the underlying data, rather than simply flagging them as unreliable. This is a behavior-shaping instruction that could cause the agent to hide information from the user.

Same pattern as the US search tools — instructs the agent to never infer or surface any meaning from carfax_* fields, potentially withholding relevant vehicle history information from users without disclosure.

Same pattern as the other search tools — instructs the agent to treat carfax_* fields as nonexistent, which could cause relevant vehicle-history data to be silently withheld from the user.