An agent has to make a second call before it can date IP Fabric's path answer

Aragon's worked example is a mailing application with connectivity problems, where the engineer wants the infrastructure it depends on and the routing or security controls that might stop it reaching a destination ^[21]. Three results look similar in a transcript and mean different things on the wire. A source missing from the discovered network can produce an error, and that error tells the agent the lookup failed without establishing why ^[9]. A path can also appear to have been forwarded successfully and end at transit, with no warning that the destination is missing or invisible, and a default route can make an unreachable destination look like an ordinary Internet path ^[10]. A modelled block looks different. Aragon said the path should stop at a device and show dropped traffic on an edge, which he distinguishes from merely reaching the limit of the model's visibility ^[11].

On who decides what, Aragon told LDS: "The reachability verdict itself, though, still comes from IP Fabric's computation rather than the model's judgment" ^[3]. The assistant chooses what to ask and explains the result ^[4]. Those are two artifacts with different review needs. The computed path is evidence about the modelled network and reproduces on rerun; the query selection comes with no such guarantee ^[5].

IP Fabric's snapshot documentation describes records of network state at a particular time, and warns that comparing a partial snapshot with a full one can produce false positives because part of the network is missing ^[6]. The word verified has a narrow sense in Aragon's answers: application connectivity has been evaluated against the network model, a smaller claim than every fact needed for an operational decision being present and current ^[20]. An agent that never calls the health check will answer just as quickly about a snapshot collected last week.

His recommended checks include verifying the source IP and matching lookup ports to the flows table ^[13]. Both are manual work on the inputs, done before anyone reads the path result.

Two properties have to hold for the same evaluation to transfer to another MCP-fronted assistant. The platform, not the model, has to compute the verdict, which is the split Aragon claims for IP Fabric ^[3]. The collection time has to be retrievable by a call the agent can make, because freshness here is an operator action: teams schedule collection, trigger a snapshot or refresh the relevant devices ^[8]. Where either property fails, the reviewer has only the assistant's own text to check against. The checks are Aragon's own, published in a written interview with Lets Data Science, with no independent test of them in the material ^[1].