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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description adds the meaningful scoping fact that only approved (public) videos are returned by default and that approve/reject operations are not available here, but says nothing about pagination or result limits.

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 tight sentences with zero filler; the default-status constraint is front-loaded immediately after the purpose statement.

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 simple two-parameter read tool with no output schema, the description covers the default filter and the read-only scope adequately. The only shortfall is the undocumented limit parameter and unstated pagination behavior.

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 50%: the status enum carries its own description while limit is undocumented anywhere. The description reinforces the default status behavior but adds no syntax or range detail for limit, so it only partially compensates for the gap.

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 and resource ('List QuailOS TV videos'), which is clear on its own. However, it does not distinguish itself from the sibling get_quailos_tv (single-item fetch), leaving the agent to infer the list-vs-get split from the names alone.

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?

'Default status=approved only (public)' implies the normal usage context, and 'no approve/reject' hints at scope. But there is no explicit when-to-use guidance, no mention of when to pass non-approved statuses beyond the schema note, and no routing to or away from sibling tools.

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