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

Annotations already cover read-only, idempotent, and non-destructive behavior, so the description's job is to add context — which it partly does by disclosing that the poster sees every bidder's record and Word Pass and that access is free with no key. That visibility/permission nuance is genuinely useful, but it is compressed to the point of ambiguity (does 'no key' mean no auth or no payment?) and says nothing about behavior when the tender is missing or closed.

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 no padding, and the core payload ('one tender with its bids') is front-loaded. It is telegraphic enough that a little structure is lost, but nothing is wasted.

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 must carry the return shape, and it only sketches it ('with its bids', 'bidder's record and Word Pass') without indicating what a bid record contains or how the poster-vs-bidder view differs. Adequate to call correctly, incomplete for interpreting results.

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?

A single required parameter with 100% schema description coverage, so the schema already explains tender_id and its provenance. The description adds no format, id-shape, or error semantics beyond that, making the baseline 3 appropriate.

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?

"One tender with its bids" names the resource and its scope (single tender, bids included), which implicitly distinguishes it from the sibling list_tenders. It is a fragment rather than a full sentence, but an agent can tell what it fetches 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?

No statement of when to call this versus list_tenders, my_tenders, or close_tender. The only routing hint ('tender id from list_tenders or post_tender') lives in the schema, not the description, so the description itself offers no usage guidance.

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