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

With no annotations, the description carries the full behavioral burden and does disclose useful traits: it is a read/list operation, sourced from a live manifest rather than the D1 catalog, with degraded-mode resilience. It omits pagination semantics, ordering guarantees, rate limits, or auth needs, so the disclosure is partial.

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 sentences, front-loaded with purpose and the differentiator (live manifest, catalog-independent) before the filter list. Efficient, though the trailing filter enumeration is largely duplicative of the schema.

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 9-parameter list tool with no output schema and no annotations, the description covers the source and resilience well but leaves the return shape, pagination defaults (limit 20/offset 0), and filter semantics unaddressed. Adequate but with clear gaps.

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 only 11% (just the 'family' param), so the description was expected to compensate. It merely enumerates the filter names already visible in the schema ('query, family, tag, network, asset, payTo, maxUsdPrice, limit and offset') without explaining matching behavior, value formats, or how maxUsdPrice/network are interpreted.

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 and resource ('List verified Saylor Innovations x402 endpoints') and pins the data source to the live Saylor manifest, which distinguishes it in kind from the generic list_resources/search_resources siblings. It stops short of naming those siblings or stating explicitly how results differ from them.

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?

It gives one conditional use case — 'keeps working during catalog quota exhaustion' — which implies fallback usage, but never says when to prefer list_resources or search_resources instead. Usage is inferred rather than directed.

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