update_users_settings_plex

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

Annotations already convey that this is not read-only, is idempotent, is non-destructive, and is open-world. The description adds essentially no behavioral context beyond 'Update', which simply mirrors readOnlyHint=false. It does not explain whether the request replaces or merges settings, what prerequisites exist, or what side effects may occur. No annotation contradiction is present.

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?

The description is short, front-loaded with the action and endpoint, and contains no filler. The single Args note earns its place by pointing the agent to the schema source before constructing the body.

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?

The description is workable for an open-world update with an output schema and one free-form body parameter, especially because it directs the agent to schema discovery. However, it leaves gaps: it does not clarify whether this is a full replacement or partial update, what 'Plex settings' encompasses, or how this tool relates to Plex connect/sync siblings. These gaps make it adequate but not 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?

The input schema only defines body as an object with additionalProperties true and has 0% field coverage. The description compensates by labeling body as the request payload and explicitly telling the agent to discover expected fields via the matching GET or /schema endpoint, which is valuable for an open-ended body. It still does not enumerate actual fields, but it gives a concrete discovery path.

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 clearly states the operation ('Update Plex settings') and gives the exact HTTP method and path, so an agent can tell what resource is being acted on. However, it does not differentiate from sibling Plex-related tools such as create_users_settings_plex_connect or update_users_settings, so it stops short of a perfect score.

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?

The description gives no guidance on when to use this tool instead of alternatives like update_users_settings, create_users_settings_plex_connect, or delete_users_settings_plex_connect. The only instruction is to read the matching GET or /schema endpoint first, which is a prerequisite rather than a usage guideline.

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