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

With no annotations, the description does useful work by disclosing that it performs a single search pass and that billing and authorization are handled by the caller's OpenAny gateway, which signals a paid, credentialed call. It stops short of describing the answer/citation output format, latency, or failure behavior for a mutation-looking POST endpoint.

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 short sentences, front-loaded with the core action and followed by the credential/charging note. There is no filler, though the second sentence is operational rather than task-selection information.

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 seven-parameter tool with no annotations or output schema, the description covers cost/authorization but leaves the return shape (how citations are presented) and the distinction from the sibling search tool unstated. It is adequate but not complete for an agent deciding between answer generation and raw search.

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 100%, so all seven parameters, including the domain filter interplay among boost_domains, include_domains, and exclude_domains, are already documented in the schema. The description adds no parameter-level meaning beyond that baseline.

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 verb and artifact: 'Generate a cited answer using a single web-search pass.' That distinguishes it in substance from a plain results-returning search, but it never names the sibling youcom_post_v1_search or explicitly contrasts the two, 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: nothing says to prefer this over youcom_post_v1_search when a synthesized, cited response is wanted, nor when to avoid it. The mention of gateway credentials and charges is operational context, not a selection rule.

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