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

With no annotations provided, the description carries the full burden, and it discloses the non-obvious commercial fact that this call is free and precedes payment, which is the main behavioral risk for a paid API. It does not explicitly state read-onlyness, idempotency, or output ordering, but "list" plus "free to call" conveys the safe-read nature adequately.

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, zero filler, with the purpose stated first and the usage cue second. Every sentence earns its place.

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 no-parameter discovery tool with no output schema, the description covers what is enumerated (tasks) and the key attribute (USDC price) plus the cost model. Slightly more detail on the returned fields would help, but nothing essential to correct invocation is missing.

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 takes zero parameters, so the baseline is 4 and there is no parameter meaning the description needs to compensate for. Nothing about the schema requires elaboration.

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?

"List every available micro-task and its price in USDC" gives a specific verb (list) and resource (micro-tasks) plus the payload attribute (price in USDC). It is clear enough to distinguish from siblings like execute and verify, though it never names them, so the boundary with the similarly-scoped price tool is left implicit.

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?

"Use this to see what the agent can do before paying" supplies a concrete usage context: discovery ahead of any paid call. It does not explicitly exclude alternatives or say when to use price or execute instead, so routing is guided rather than spelled out.

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