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

Annotations already declare readOnly, idempotent and openWorld, so the safety profile is covered. The description adds genuine value beyond them with the pricing model (0.005 USDC per successful call via x402 on Base, errors free), which an agent needs for cost-aware planning; it omits auth/wallet requirements and rate limits, keeping it short of a 5.

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 compact sentences, both earning their place: the first front-loads what is returned, the second front-loads cost. No filler.

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?

With no output schema, the description usefully enumerates the returned fields (buyer, CPV codes, regions, deadline, source link) and the cost model, which is enough for a single-parameter read tool. The only gap is guidance on how to obtain a valid id.

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 coverage is 100% and the id parameter already carries a regex pattern plus two worked examples, so the schema does the heavy lifting. The description adds no syntax or format detail beyond it, which is the expected baseline.

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 names a concrete resource ('one procurement notice') and enumerates the payload fields an agent can expect, so the tool's job is unambiguous. It does not, however, explicitly differentiate itself from search_tenders, which is the obvious sibling an agent could confuse it with.

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?

There is no when-to-use guidance, no mention of the prerequisite of obtaining an id via search_tenders, and no stated exclusions. The singular 'one' implies a by-id lookup, but the agent must infer that entirely.

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