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

With no annotations, the description carries the full burden and does add real behavioral facts: the 10-hop cap, the use of HEAD rather than GET, and that each hop's status and Location are recorded. However it omits error/timeout behavior, what happens on non-redirecting URLs, and whether the 'signed wallet' implies an auth or payment requirement - all relevant for a network-fetching tool.

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?

Two tight, front-loaded sentences with no filler; the redundant 'Redirect Trace:' prefix restates the name but costs little. The trial-call note is placed last, which is appropriate.

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?

No annotations and no output schema, so the description must do everything. It covers the core fetch behavior and roughly what is recorded, but it omits parameter documentation, error handling, and the auth/payment implication of 'signed wallet'.

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% and the description never references the 'url' or 'input' parameters, leaving both entirely undocumented. Two undocumented parameters with an unexplained duplication ('input' alongside 'url') is a notable gap that the description should have closed.

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?

States a specific verb ('Follows') and resource ('redirect hops'), plus concrete mechanics (HEAD requests, status and Location headers). It is clearly distinguishable from generic HTTP siblings like x402-http-headers, though it never names an alternative sibling for comparison.

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 explains what happens during the call but gives no guidance on when to choose this over related tools such as x402-url-expand, x402-url-unshorten, or x402-link-check, and states no prerequisites or exclusions.

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