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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds genuinely useful return-value context ('delivered public watch links', production status) which matters because no output schema exists, but it omits ordering, pagination, and whether non-delivered episodes are included.

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?

A single compact sentence fragment with no filler; every word conveys a field the tool returns. It loses a point only because it is a fragment that leads with output contents rather than the action, so the reader must reconstruct intent from the tool name.

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 one-parameter read tool with annotations and no output schema, the description covers the shape of the result, which is its most valuable contribution. However, it leaves the agent guessing about the required series_id and about filtering/pagination, so it is adequate rather than complete.

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 0%, so the schema only supplies the name 'series_id' and type string. The description makes no reference to the parameter at all, giving no indication of format, ID source, or whether it accepts slugs versus numeric IDs. It does not compensate for the coverage 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?

The description is a noun phrase listing the fields returned ('Episode numbers, titles, production status and delivered public watch links') rather than stating the action. Combined with the name list_episodes and the single series_id argument, an agent can infer that it enumerates episodes of a series, but the description itself never says so and never distinguishes it from get_episode or list_series.

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 statement of when to use this tool versus get_episode (single episode) or list_series (all series), and no mention of prerequisites such as needing a valid series_id. Usage is only inferable from the tool name, not the description.

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