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

Annotations provide readOnlyHint=true, so the description does not need to state that. It adds the behavioral detail of ranking by rating and the cross-catalog synthesis nature. However, it does not disclose output format, pagination, result limits, or any side effects. Given the annotation covers the safety profile, this is a reasonable but not rich 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?

The description is concise, two sentences, and front-loaded with the category label 'UNDERSTANDING'. It includes pricing and a reference to the price catalog. Every sentence serves a purpose, though the pricing detail might be better placed in annotations or a separate field, but it does not detract significantly.

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 tool with two parameters, no output schema, and no parameter descriptions in the schema, the description is incomplete. It does not explain what the output looks like beyond 'ranked by rating', nor does it clarify the input parameter semantics, alternatives, or edge cases. An agent would struggle to invoke this correctly without further investigation.

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?

The description does not explain the required 'slug' parameter. It implies a company identifier ('company's adopted stack') but never explicitly maps slug to that. With schema description coverage at only 50% and no description on slug, the description fails to compensate for the gap, leaving the agent to guess what slug represents.

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 states a specific function: matching apis.io providers to a company's adopted stack, ranked by rating. It conveys the core logic (supply↔demand join) and the ranking. However, it does not explicitly distinguish this from sibling tools like find_providers or find_similar_providers, and the title 'Match providers to a need' conflicts slightly with the 'company's adopted stack' framing, leaving some ambiguity about the input slug.

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 guidance on when to use this tool versus alternatives such as find_providers, find_similar_providers, or compare_providers. The description does not state prerequisites (e.g., having a company slug), exclusions, or conditions that would select this tool over others. The pricing note is useful but not about usage context.

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