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

Annotations already declare readOnlyHint and openWorldHint, and the description adds genuine context beyond them: the exact shape of what comes back (sections with title metadata, banners, hot words) and the important limitation that only public catalog metadata is returned, never playable video. A small gap remains around pagination exhaustion or total page counts, but the scope clarification is valuable.

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?

Front-loaded with the action and the key input constraint, with no filler. The long enumeration of returned fields partially duplicates the existing output schema, which costs it a point, but the sentence still reads as purposeful rather than padded.

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?

With an output schema present, the description need not explain return values in full yet still summarizes them, plus it names the upstream tool for channel names and clarifies the non-playable, public-metadata nature of the response. Nothing an agent needs to invoke it correctly is missing.

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 100%, so page and limit bounds are already documented. The description adds a routing constraint the schema cannot express: channel values must be taken from dramabox_channels, which prevents the agent from inventing channel strings and lifts this above the baseline.

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: fetch one page of a DramaBox channel feed from the theater, with an explicit channel-scoped result shape (sections, banners, hot words). It is clearly distinguished from dramabox_channels, which is named as the source of valid channel names rather than a competing feed tool.

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?

Gives clear operating context: the channel argument must come from dramabox_channels, and the enumeration of allowed channels is repeated. It does not explicitly say when to prefer this over dramabox_home, dramabox_browse or dramabox_trending, so the routing guidance stops short of a full when/when-not statement.

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