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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description still adds value beyond them by disclosing the returned fields (title, folder, document count and state), which matters because no output schema exists, and by restating the default scope when app_id is omitted.

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 short sentences with the scope up front and the return payload second; nothing is padding. The first sentence is a bare noun phrase with no verb, which is slightly less crisp than 'Lists the notebooks of...', but it is still easy to parse.

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?

For a single optional parameter with full schema coverage and no output schema, the description covers scope and return fields adequately. What it lacks is any link to the large family of adjacent knowledge tools (folders, documents, notebook overview, app knowledge access), leaving the agent to guess which one to call.

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%, so the app_id parameter and its default are already fully documented in the schema. The description's 'or of one app' wording mirrors rather than extends that meaning, leaving the baseline score appropriate.

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 the resource (knowledge notebooks) and its scope precisely: the owner's Business Brain, or a single app. It also enumerates the fields surfaced (title, folder, document count and state), so the agent knows exactly what it gets. It stops short of distinguishing itself from close siblings such as get_knowledge_notebook_overview or list_knowledge_folders.

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?

There is no explicit when-to-use guidance, no exclusions, and no named alternative among the many list_/get_knowledge_* siblings. The closing sentence, 'Agents and apps answer from notebooks they are given,' is background context about notebooks rather than a call to use this tool in a particular situation.

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