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

Annotations declare readOnlyHint=true, and the description is consistent with that. The description doesn't add much behavioral depth beyond what annotations provide—it doesn't mention pagination, filters, or the structure of the returned content. It adds useful context about the available sections and the meaning of 'section_id', but for a read-only browse operation, the transparency is adequate but not rich.

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 concise and well-structured. It opens with a clear purpose sentence, provides the bilingual context, and then lists all valid sections in a bulleted list. The parameter explanation follows. While the list is long, it is necessary for usability. It avoids fluff and stays focused.

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?

Given that the tool has a single parameter with a well-defined list of values, the description is nearly complete. It doesn't describe the return structure, but the presence of an output schema (not shown but indicated) likely covers that. It doesn't mention potential edge cases like invalid section IDs, but the list serves as a guide. For a simple browse operation, this is sufficient.

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 0% (the schema only provides the parameter name 'section_id' with no description). The description compensates by explaining that section_id is the section identifier and listing valid values (e.g., 'AJA', 'Documentaries'). This gives the agent concrete guidance on what to pass, which is essential given the lack of schema-level documentation.

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 states a clear verb ('Browse') and resource ('content in a specific section/channel'), and provides a comprehensive list of valid sections with bilingual labels. This clearly distinguishes it from siblings like 'list_sections' (which likely lists sections) and 'search_videos' (which searches across all content).

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?

The description implies this tool is for browsing a specific section, as opposed to searching or listing sections, but it does not explicitly state when not to use it or name alternatives. The inclusion of the full section list helps the agent know what values to pass, but it doesn't explicitly say 'use this instead of search_videos when you have a section known.'

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