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

Annotations already declare readOnly/idempotent/openWorld=false, so the description needn't cover safety. It adds value beyond them: prices are 'now (after any sale or launch discount)', so values are live rather than static, and purchase is explicitly out of scope ('Buying happens on pageUrl'), which prevents an agent from trying to transact. It does not mention behavior for an unknown slug (error vs empty).

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 sentence, front-loaded with the core action and key, followed by a dense but purposeful enumeration of returned fields; nothing is redundant. It is long and comma-heavy, which slightly hurts scannability, but each listed item earns its place by describing a distinct payload section.

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?

There is no output schema, and the description compensates by enumerating the returned sections (packages and per-package pricing, licence line, features, use cases, tech stack, demos, docs, app/bundle relations, bundle membership). Only gaps are locale handling and error behavior for an invalid slug.

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 100%, so both parameters are already documented in the schema; baseline 3 applies. The description reinforces the slug's provenance ('from search-templates') but says nothing about locale, which the schema alone explains (enum of en/fr/es/ar, default en).

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 and resource ('One Aniq-UI template in full') plus the keying identifier ('by its slug from search-templates'), and then enumerates exactly what 'in full' means: packages, prices, licence, features, use cases, stack, demos, docs, relations, bundles. This clearly separates it from search-templates (which yields slugs) and list-categories.

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 implied rather than stated: 'by its slug from search-templates' tells the agent where the input comes from, and 'Buying happens on pageUrl' implies this tool is for inspection, not purchase. There is no explicit when-not-to-use or named alternative for listing many templates, so the agent must infer the workflow.

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