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

Annotations already declare readOnlyHint=true, destructiveHint=false, openWorldHint=false. The description adds substantial beyond that: it explicitly reassures there are NO secrets, explains why (OAuth client IDs are public by protocol design, no flow uses a client secret), and describes the audience-per-platform behavior. Strong added context for a read-only tool.

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 scope is front-loaded ('GET ONLY the Authentication field...'), followed by dense but relevant detail on contents, secrets, and platform audiences. Every sentence carries information, though the platform-audience sentence is somewhat elaborate for a description.

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?

No output schema exists, so the description carries the burden of explaining the return value, and it does so thoroughly (field contents, public client IDs, per-platform audience). It is nearly complete, missing only an explicit statement of what to do when the section is empty or how the caller should consume multiple filled IDs.

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?

Only one parameter (title_id) with full schema description coverage, so the schema already documents it. The description adds no syntax or format guidance for title_id and focuses entirely on return content. Baseline 3 is appropriate.

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: it reads ONLY the 'Authentication' field of TitlePublicConfigurationModel, and it names the content (third-party sign-in methods, OAuth client IDs). An agent can tell exactly what is returned. However it does not explicitly name its write counterpart save_authentication or get_title_data, so sibling differentiation is only 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?

Usage is implied by the scope description rather than stated. It notes that device/e-mail/Telegram/SSO logins need no configuration so are absent, which lightly signals when this endpoint is relevant, but there is no explicit when-to-use/when-not or reference to the save_authentication alternative.

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