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 genuine behavioral context: the cost model ('$0.001/check x402 or Register plan') tells the agent this is a paid/authenticated call. It still omits the return shape (boolean? duplicate record?), whether it is purely read-only, and idempotency, so it is only partially transparent.

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 short sentences with the action and trigger front-loaded and the pricing note trailing. Nothing is wasted, though it is terse to the point of under-specification.

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 3-required-param tool with no annotations, no output schema, and zero schema description coverage, the description should explain the parameters and the return outcome. It covers neither, leaving only the cost model as extra information.

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% across all three required parameters (kind, name, provider), and the description explains none of them. The bare mention of 'asset' and 'register' is the only hint linking the params to the check, so it fails to compensate for the coverage gap.

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 states a specific verb ('check') and resource ('the register') plus a trigger ('before creating/paying for an asset'), which conveys the intent is a pre-creation existence/duplicate check. However, it never distinguishes this from siblings like register_list, prove_title, or sweep, so an agent cannot tell which register-related tool to pick from the description alone.

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 a clear trigger condition ('before creating/paying for an asset'), which is stronger than nothing. But there are no when-not conditions and no named alternatives among register_list, prove_title, or sweep, so routing still relies on inference.

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