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

Beyond the readOnly/destructive/idempotent annotations, it discloses metered economics (3 free daily calls, then 0.01 USDC via x402 on Base) and a payload constraint (description capped at 6000 characters, official source link included). The quota and payment behavior are exactly the kind of operational context an agent needs before invoking and is not derivable from annotations.

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?

Three sentences, front-loaded with purpose, then cost, then scope caveats; little waste. The trailing 'description is limited to 6000 characters with an official source link' is slightly compressed and takes a moment to parse, but it 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 single-parameter read tool with no output schema and strong annotations, the definition covers purpose, input provenance, cost, and result scope. It omits failure behavior when the free quota is exhausted or payment is declined, which is the main remaining gap.

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?

There is one parameter with 0% schema description coverage, so the description must carry meaning: it does, by identifying ocid as an identifier returned by search_tenders and framing the returned entity as 'latest ingested notice'. It still says nothing about the ocid's format or the 113-character constraint, so it is only partial compensation.

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 ('Retrieve latest ingested notice by an ocid') and names the sibling that supplies the input ('returned by search_tenders'). It also pre-empts a likely misconception by declaring 'Not a compiled procurement history', which lets an agent distinguish it from a history/coverage tool without opening the schema.

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?

Explains where the required ocid comes from (search_tenders) and gives the cost condition for calling it: one of three daily free calls, then x402 payment. It does not contrast use cases with the other sibling, check_coverage, so it stops short of full when/when-not guidance.

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