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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds the notion of a curated set ('confirmed original references'), hinting at filtering, but never explains what that means or how many/why four.

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 front-loaded sentence with no padding. Slight loss because the trailing qualifier is ambiguous rather than informative.

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?

Output schema handles return values and annotations handle safety, so the remaining burden is small. Still, the description leaves the agent unsure what makes a reference 'confirmed original' and how this listing relates to academy_path.

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 100% and both parameters (locale, idempotencyKey) are explicit transport-level fields documented in the schema, so baseline 3 applies. The description adds nothing about parameters, which is acceptable here.

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 ('List') and resource ('learning paths'), which distinguishes it from academy_path (singular detail) and academy_levels. The qualifier 'with confirmed original references' is unexplained jargon, but the core action is unambiguous.

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 guidance on when to call this versus academy_path, academy_levels, or academy_start. It implies a catalog/overview listing, but the agent must infer that from sibling names alone.

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