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

Annotations already declare readOnly, openWorld, and idempotent hints; the description does not contradict them. It adds methodological context (GRI, EU TED) but no additional behavioral details such as data sourcing caveats, latency, or rate limits, so value beyond the annotations is modest.

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 functional sentences front-load the purpose, inputs, and outputs, but the trailing keyword list is redundant with the body and adds little value. The description is compact and scannable overall.

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 an output schema present and annotations covering safety, the description provides sufficient orientation: what inputs are expected, what analysis is performed (GRI, EU TED), and what outputs are produced. It omits optional parameter handling and limitations, but those are secondary; the core context for a COO user is present.

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 only 25% (async described), and the description partially compensates by naming the two required inputs ('procurement objectives' and 'ESG focus areas') and giving examples (carbon reduction, supplier diversity). It does not explain procurementObjectives structure (id, weight) or the optional industrySector field, leaving a gap.

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?

The description opens with a specific verb-resource pair: 'Aligns procurement OKRs with ESG targets' and adds methodology (GRI standards, EU TED benchmarks) plus outputs (alignment scores, gap analysis, recommendations). This clearly distinguishes it from sibling ESG tools like hr_benefits_esg_aligner or action_plan_esg by focusing on procurement and COOs.

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 identifies target users ('COOs integrating sustainability into procurement strategy') and the context of procurement objectives with ESG focus areas, which implies when to use. However, it does not explicitly name alternatives or state when not to use it, unlike a best-practice exclusion.

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