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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, so the safety profile is covered; the description usefully adds that the target is a niche external streaming catalog (binge.tube). It says nothing operational — no cap of 20 results, no ranking behavior, no empty-result behavior — so it adds only modest context beyond the structured fields.

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 sentences, zero filler, and the identification of the site and content type is front-loaded before the usage condition. Every clause earns its place.

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 search with rich annotations, the description covers what is being searched and when to call it. It leaves the result shape and the limit/pagination behavior unexplained, which matters slightly more because there is no output schema.

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 only 50%: `query` is documented in the schema, while `limit` has no description anywhere. The description does sharpen `query` semantics by clarifying matches are on title or words in the story (plot keywords, not just titles), but it never addresses the undocumented limit parameter or its maximum of 20.

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 (search) and resource (BingeTube shows) and adds domain context — short vertical drama series with 1–2 minute episodes — that tells the agent exactly what corpus is being queried. It does not name a sibling, so the boundary with get_show (fetch one known show) or top_shows is left implicit.

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?

"Use it when someone asks for a specific short drama, or where to watch one" gives a clear triggering condition. No when-not guidance or named alternatives (e.g., "use get_show once you have an ID"), which keeps it below a 5.

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