x402 Bazaar Listing Monitor

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It describes non-mutating behavior ('Checks', 'Flags') and adds important nuance: it is the same per-seller diff as the scheduled poller, runs once on demand, and works for unregistered sellers. It does not mention auth, rate limits, or exact response structure, but the behavior is reasonably disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences, front-loaded with the primary purpose, and every clause adds value—especially the comparison to the scheduled poller and the registration-independent behavior. No filler or redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple two-parameter check tool with no output schema and no annotations, the description covers purpose, inputs, behavioral nuance, and output concept ('listed or missing'). It lacks a precise return format or error conditions, but the overall contextual picture is solid.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, but the description names both parameters and gives context: payTo is the address under which resources are listed, and resources are the x402 Bazaar resources to check. It adds some meaning beyond the schema's raw types/patterns, but does not explain what constitutes a resource string or how the flagging result is structured.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool 'Checks whether a seller's x402 Bazaar resources are currently listed' and 'Flags each resource as listed or missing', using a specific verb and resource. It also distinguishes itself from the scheduled poller by noting it runs on demand, giving unique purpose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context: this is an on-demand check for a payTo/resources pair, usable 'whether or not it has been registered with this service'. It implies when to use it, though it does not explicitly list alternative tools or when-not scenarios.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.