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

Adds value beyond the annotations: it discloses the auth prerequisite (a Cotlet API key with access to this app) and a non-obvious behavioral trait — that Bandsintown rewrites ticket links so displayed links may differ from the raw stored value. Annotations already cover the read-only/non-destructive profile.

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 the tool's function, but the field list is stated twice ('venue, lineup, description, ticket links...' and again as the full event-form fields). The redundancy costs space without adding information.

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 single-parameter read tool whose safety profile is already covered by annotations, the description is largely sufficient: it enumerates returned fields, flags the auth requirement, and notes link rewriting. It stops short of describing pagination or error behavior, which is minor here.

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% and the single event_id parameter is already documented in the schema as coming from list_events. The description adds no format or lookup detail beyond what the schema provides, so the baseline of 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 verb+resource and makes scope explicit with 'One event in full,' listing the concrete fields returned (venue, lineup, description, ticket links, on-sale time, URL). The 'one event' framing implicitly contrasts with the list_events sibling, but it never names it.

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 explicit guidance on when to use this versus alternatives such as list_events, update_event, or search_venues. The singular 'One event' implies detail retrieval rather than listing, but that condition is left for the agent to infer.

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