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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds one genuine behavioral fact beyond that: results are sorted by soonest closing. It does not disclose the default page size, the 20-item cap, or pagination 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?

Two tight parallel sentences (Arabic then English) with the key ordering constraint front-loaded and no filler. The bilingual duplication is functional rather than wasteful, though it doubles the surface length.

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 read-only, no-required-param listing tool with annotations covering safety, the description covers selection and ordering. With no output schema, though, it never indicates what a returned tender record contains or how many results to expect, leaving a modest 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?

Schema description coverage is 75%, with region, activity and closing_within_days all documented in-schema and echoed in the description. The undescribed parameter (limit) is also unaddressed in the description, so it adds no meaning beyond the schema; baseline 3 is 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?

States a specific resource and scope: tenders currently open for bidding, with the ordering rule (closing soonest first) and the optional filters named. An agent can distinguish this from get_tender (single tender) or market_report, though no sibling is named explicitly.

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?

Usage is implied by 'open for bidding now' and the sort order, which tells the agent this is a list-now tool. However, it never says when to prefer this over search_tenders or search, nor any prerequisite/exclusion, so the routing decision is left to inference.

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