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

With no annotations the description carries the full burden, and it discloses notable behavior: first-time queries on still-bidding cases may take several seconds, a failure path points to official_details_note, and it flags that the bid-opening detail is data unique to this tool. It stops short of describing auth needs or output shape, but for a read tool this is solid disclosure.

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?

Front-loads the primary value (the full lifecycle and the unique bid-opening detail) before the long enumeration of official_details fields. It is dense but every clause conveys concrete returned data rather than filler; slightly verbose in the official_details list.

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 does the heavy lifting well, enumerating returned fields, competition metrics, and external URLs, plus latency and failure handling. It is nearly complete for a single-record fetch tool; only return structure/format nuances remain unspecified.

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 0% for two required params, so the description must compensate. It does explain the provenance of unit_id and job_number (from search_tenders result rows) but never clarifies what each identifier actually denotes, adding origin information without full semantic meaning.

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+resource (retrieve one tender's complete lifecycle from tender announcement to award) and enumerates exactly what it returns: every announcement, budget/award amounts, winning vendor, competition intensity, renewal status, URLs, and bid-opening details. It also distinguishes itself from search_tenders by noting unit_id/job_number come from search_tenders result rows.

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?

It establishes the prerequisite relationship to search_tenders (inputs come from its result rows) and gives a debugging hint (see official_details_note when data can't be fetched). However, it never states when to prefer this over siblings like vendor_report, price_analysis, or compare_vendors, leaving usage largely implied.

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