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

Annotations already cover readOnly, idempotent and non-destructive traits, and the description adds genuinely new behavioral context: it is free and requires no key (auth requirement), and the poster's view exposes every bidder's record and Word Pass (data-visibility scope). That is meaningful beyond the annotations, though it does not address rate limits or error behavior.

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 very short, front-loaded sentences with no filler, and the core purpose leads. It is arguably telegraphic to the point of being cryptic ('Word Pass', 'Free, no key'), but nothing is padded.

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 simple one-parameter read tool with no output schema, it covers purpose, auth and visibility. However, it leaves the tender_id parameter and the returned shape (bids, records, Word Pass fields) undocumented, which an agent would want before invoking.

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% for the single required parameter tender_id, and the description says nothing about its format or where to obtain it. There is only one parameter, but the description does not compensate for the schema's silence on it.

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 resource and scope: retrieving a single tender together with its bids. The singular framing implicitly distinguishes it from list_tenders/my_tenders, but it never names the sibling it is contrasted against, so an agent must infer the boundary.

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 prerequisites (beyond 'no key'), and no mention of the alternative list_tenders or my_tenders. The note about what the poster can see describes payload content, not when this tool should be chosen.

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