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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered structurally. The description adds one genuinely new behavioral fact beyond that: the content is public and requires no account, which tells the agent no auth flow is needed before calling. It stops short of noting rate limits or answer size, keeping it at a 4 rather than a 5.

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?

It is a single front-loaded sentence: the subject is identified first, then the contents are listed compactly with no filler. The parenthetical catalogue inventory is slightly dense but every item conveys real scope information.

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 description must convey what comes back, and it does so by enumerating the covered topics including explicit negatives ('features not included') and trial terms. For a simple, single-parameter read-only tool this is close to sufficient; only the answer's shape/length is unstated.

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?

There is a single optional parameter with 100% schema description coverage and an explicit fr/en enum, so the schema already carries the semantics. The description never mentions the language parameter, adding nothing beyond the schema — the baseline 3 applies when coverage is this high.

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 opens with a specific verb+resource framing ('Summary of nophi.sh, a phishing-awareness training service') and then enumerates exactly what the summary covers: audience, capabilities, the 5-step workflow, catalogue sizes, excluded features, and trial terms. This implicitly separates it from siblings like get_pricing or list_courses, but 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: the enumeration of contents makes clear this is the orientation/overview call, and 'Public facts; no account needed' establishes a prerequisite. There is no explicit statement of when to prefer this over get_pricing, get_template_categories, or compare_fit, so an agent must infer the routing.

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