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

Annotations already declare readOnlyHint=true, destructiveHint=false and closed-world scope, so safety needs no restating. The description nonetheless adds a genuinely non-obvious behavioral detail — that logo links expire after 24 hours — which affects how an agent should use returned URLs.

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 dense sentence front-loads the resource and then the returned payload, followed by a terse 'Read-only.' Nothing is padded, though the trailing 'Read-only' largely repeats the readOnlyHint annotation.

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 field enumeration does real work by telling the agent what comes back, including the time-limited logo links. The main gap is how to obtain a valid brand_kit_id, which matters for a single-required-parameter lookup tool.

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%, so the single brand_kit_id parameter is documented only as an integer with minimum 1. The description does not explain the id's origin (e.g. from brand_kit_list), its format, or what happens with an invalid/foreign id, leaving the required parameter semantically thin.

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 concrete verb/resource (get one brand kit) and enumerates what the kit contains: colours by role, fonts, logo links, guidance, forbidden elements, CTA style, photo count. The phrase 'One brand kit' signals single-item retrieval as distinct from a listing tool, though no sibling is named explicitly.

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?

Usage is only implied: an agent can infer this is the fetch-by-id counterpart to a list tool, but the description never says when to use this versus brand_kit_list or what to do if the id is unknown. No prerequisites or exclusions are given.

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