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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower. The description adds genuinely useful behavior beyond that: it discloses the output artifacts including the target file path and an install command that bundles logos, which the agent could not otherwise predict.

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?

A single front-loaded sentence that names the section and its three return values with zero filler. Nothing is repeated or padded.

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 correctly carries the return-value burden and does so by naming the code file, the install command, and the builder link. It is complete enough to call and interpret; minor gaps like ordering expectations (search first) sit in the schema rather than the prose.

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 five parameters (logos, names, style, layout, heading) already carry inline descriptions and enum values. The description adds no parameter-level detail beyond the schema, making baseline 3 correct.

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 ('Build') and resource ('Trusted by' logo cloud section), then enumerates the three concrete artifacts returned (React code path, shadcn install command, builder link). This clearly distinguishes it from retrieval siblings like get_logo_component and search_logos, which fetch rather than generate.

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?

The description implies a generative/composition role distinct from the lookup siblings, but never states when to use it versus alternatives (e.g., that search_logos should be called first to obtain slugs, though that hint lives only in the schema). Usage is inferable, not explicit.

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