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

readOnlyHint=true already tells the agent this is a safe read, and an output schema exists, so the field enumeration in the description is largely redundant. It adds little behavioral context beyond the annotations — no pagination, order, or limit behavior is disclosed.

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 tight clauses with no filler, front-loading what the tool returns before the usage notes. The 'and before looping terms in a bundle' clause is slightly awkward but still earns its place.

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 an output schema covering the return shape and readOnlyHint covering safety, the description only needs to add scoping and routing context, which it does. The missing pieces — limit behavior and the tautology risk of the verbose create-term guidance — are minor for a simple list 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 description coverage is 67% (taxonomy and search documented; limit undocumented). The description only implies the taxonomy parameter via 'terms of a taxonomy' and says nothing about limit or search, so it neither compensates for the gap nor misleads; baseline sits between the high-coverage and low-coverage anchors.

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 fragment 'The terms of a taxonomy: termId, name, slug, parent, count, url' plus the title 'List terms' communicates a specific verb+resource and enumerates the returned fields, so an agent knows this is a taxonomy term reader. It is clear but never states the verb explicitly in prose, leaving the purpose dependent on the title.

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?

It gives two concrete call scenarios — 'Call before create-term' and 'before looping terms in a bundle' — and even supplies the rationale (avoid duplicate vocabularies like 'Sci-Fi' next to 'Science Fiction'). No explicit when-not or pagination guidance is offered, but the positive routing context is strong.

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