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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the trailing 'Read-only' is largely redundant and earns no credit. What the description does add is content-level behavior: invalid examples are returned together with their expected validator message, which helps the agent interpret results in the absence of an output schema. It still says nothing about ordering, result size, or what happens if id and kind conflict or id is unknown.

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 compact sentence with the list behavior front-loaded and the fetch-by-id case following after the semicolon. No filler, though the 'Read-only' tail is wasted space given the annotations already state it.

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 two-optional-parameter listing tool with no output schema, the description covers the main categories and mentions the validator-message field of invalid examples, which is the most important return-value detail. It is still incomplete about the shape of the returned list, the interaction between `id` and `kind`, and error behavior for an unknown id.

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 only 50%: `id` is documented but `kind` has an enum with no description. The description partially compensates by enumerating the categories (base profiles, example profiles, invalid examples) that map onto the templates/profiles/invalid enum values, though it never states that mapping explicitly or explains what the default 'all' returns. The `id` behavior (returns that single file) is a modest addition over the schema's own wording.

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 (lists) plus the concrete resources: published base profiles/accessibility templates, example profiles, and invalid examples with their expected validator messages, and covers the single-item variant ('with an id, returns that file'). It is clear about what the tool does, but it never names or contrasts with the siblings (profile_validate, format_spec, profile_describe), which could plausibly serve overlapping 'show me an example' needs.

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 'with an id, returns that file' clause implicitly tells the agent how to switch between list and fetch modes, which is useful. However, there is no explicit when-to-use vs when-not-to-use guidance and no mention of the alternatives, notably profile_validate, which is the natural sibling for validating a profile that these 'invalid examples' relate to.

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