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

With no annotations, the description carries the full burden and provides useful behavior: the directory is public, `query` is case-insensitive, and it lists the returned fields including price and preview semantics. It also explains the account/library/purchase context, though it does not describe pagination or how `limit` affects results.

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?

The description is front-loaded with purpose, query behavior, and return fields, and it remains readable throughout. Some purchase/library/playback detail goes beyond what is needed to select or invoke a search tool, but the structure is coherent and not repetitive.

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?

Since there is no output schema, including the returned fields is essential and done well, along with query semantics and purchase context. The main gap is that `limit` and pagination behavior are not explained, which matters for an agent trying to control result size.

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 0%, so the description must explain both parameters. It explains `query` well as an optional case-insensitive title filter, but it never mentions `limit` or its effect, leaving half the parameter surface undocumented.

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 names a specific action and resource: browsing the cross-host public video directory of published class recordings and courses from every mentor and studio. It also scopes the tool against mentor- or host-specific alternatives by saying to use it when the client does not name a specific teacher.

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 a clear use case: when a client asks 'what videos can I watch or buy?' without naming a specific teacher. It also clarifies that buying or claiming happens elsewhere, on /videos/{id}, but it does not explicitly name sibling tools or give further exclusions.

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