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

Annotations already declare readOnly, idempotent, non-destructive and open-world, and the description adds genuinely new operational context: it is a Preview API that may change without a version bump, and it requires the products:read scope. That auth/stability information is exactly the kind of thing annotations cannot express. It still omits pagination/return-shape behavior.

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?

Very compact, with each clause carrying distinct information (preview status, data scope, auth scope, stability). It is under-front-loaded, though: it leads with API status rather than stating what the tool returns, so the core purpose arrives only implicitly.

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 three-parameter list tool with no output schema, the description covers auth, scope and stability but leaves the listing semantics unaddressed — pagination via cursor, default page size, and the required locationId scoping. Those are the gaps an agent actually needs to call it correctly, though the safety profile is adequately carried by annotations.

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 only 33%: 'after' is described in the schema but 'limit' and 'locationId' are undocumented. The description says nothing about any parameter — notably it never explains that locationId is required and effectively scopes the whole listing, nor what limit defaults/bounds are. With low coverage, the description should compensate and does not.

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 identifies the data domain (supplier range catalog, pack-size and list-price settings) and excludes adjacent data (no personal recipes or colour mixes), but it never states the actual verb/resource pairing implied by the name — returning a paginated list of colour bar ranges. Siblings cliento_list_colour_bar_items and cliento_get_colour_bar_range are not distinguished, so an agent must infer the difference from the name alone.

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?

'no personal recipes or colour mixes' gives a scope exclusion, which is a useful boundary, but there is no statement of when to call this versus the sibling list/get colour bar tools and no prerequisite flow (e.g., obtain locationId from cliento_list_locations first). Usage must be inferred.

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