x402_trust

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

With no annotations, the description carries the full burden. It transparently states what is returned (counts by doctrine) and what is not (host details), and clarifies it is not certification. It does not mention side effects, but as a GET it is read-only by implication.

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 a single but dense sentence that conveys the essential information without unnecessary words. It is well-structured with dashes separating key points, though it includes some domain-specific jargon that might require context.

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?

The description adequately explains the output (counts by doctrine) and provides context (measurement vs certification), but it does not specify the exact output format. Given the simplicity of the tool and the presence of an output schema (not shown), this is acceptable.

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?

The tool has zero parameters and the schema is empty (100% coverage). No parameter explanations are needed, so the baseline score of 3 is appropriate; the description adds no extra parameter information because there are no parameters.

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 explicitly states it is a GET for the latest x402 catalog trust snapshot, with counts of correct 402 challenges vs phantom resources. It clearly distinguishes this from certification, making the tool's purpose unambiguous.

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 implies when to use it (for measurement, never certification) and hints at constraints (host details withheld), but it does not explicitly name sibling tools or state scenarios where alternatives should be chosen. This is a minor gap.

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