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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and openness are covered. The description adds that this is a 'public' reference page and what it contains, but says nothing about response size, pagination, or auth requirements beyond the structured hints. Adequate add-on value, not rich behavioral disclosure.

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?

Three tight sentences, front-loaded with the resource identity before the sibling comparison and the id provenance. No filler or redundancy.

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 return values need no explanation, and annotations cover the read-only/open-world profile. The description supplies content summary and id provenance, which is sufficient for a single-param detail lookup; only minor use-case framing is absent.

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 100% and the single param is already documented as 'Numeric subject id, from a psa-ticketfacts-subjects result'. The description restates the same provenance and numeric type, adding no syntax or format detail beyond the schema, so the baseline 3 applies.

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 resource ('One event's full public ticket reference page') and enumerates its content (PSA's historical writeup of the event and the ticket(s) involved). It explicitly distinguishes itself from the sibling psa_autographfacts_subject, so an agent can route without opening a schema.

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?

Clearly implies when to use it by naming the sibling it differs from ('unlike psa_autographfacts_subject, this carries no price guide') and by stating the upstream source for the id (a psa_ticketfacts_subjects result). It stops short of explicit when-not conditions or a full alternative-selection rule, so it is strong context rather than complete guidance.

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