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

Annotations already declare destructiveHint=true, idempotentHint=true and openWorldHint=false, but the description says nothing about what the destructive overwrite means (prior status lost), whether an unknown status is rejected, or what happens when the title is ambiguous. The status lists are content, not behavioral disclosure, so it adds little beyond the annotations.

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 a one-line purpose followed by dense per-type lists; nearly every token carries information since the status enum is missing from the schema. Minor inefficiency in the prose phrasing ('the movie words also work') rather than a table-like layout.

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 destructive mutation with no annotations explaining consequences and no output schema, the description should state whether updates overwrite previously set statuses or how failures surface. It also leaves two of the eight declared media types (podcast, manga) without any documented status values, which is an incompleteness an agent will hit.

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%, but the 'status' property is an unconstrained string with only 'New status value' — the description is the sole source of its allowed enum values, which is substantial added meaning. The gap is that podcast and manga appear in media_type's enum yet have no status vocabulary listed, and the 'movie words also work' aliasing rule is only half-explained.

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 pairs the verb 'update' with the resource 'status' and then enumerates the concrete status vocabularies per media type, which makes the effect tangible. It does not distinguish itself from siblings like bulk_update_status or set_progress, and the opening sentence alone is a near-restatement of the name.

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 bulk_update_status, set_progress, mark_tv_watched, or update_rating. The agent must infer from sibling names alone that this is the single-item path.

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