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

Annotations already declare readOnly, idempotent, openWorld, non-destructive, so the safety profile is covered. The description earns credit by adding trust context the annotations cannot: price/availability are 'source-reported' and must be verified out-of-band, and the tool performs no booking. It does not mention rate limits or failure modes, but it usefully flags data reliability.

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?

Two sentences, zero filler, with the core purpose front-loaded ahead of the usage caveat. Every clause carries actionable information (returned fields, verification step, capability boundary).

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 no output schema, the description compensates by enumerating what comes back (date, place, source-reported price/availability, detailUrl). It omits any mention of the sandbox fixture parameter, though the schema documents it fully, so the gap is minor rather than blocking.

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%, so both parameters (the 64-char id and sandbox) are already documented in the schema. The description reinforces that the id must be 'full' and originate from search_events, which is marginal added value over the schema's own wording. Baseline 3 applies when the schema does the heavy lifting.

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 ('look up an upcoming public event') and scopes it to a single record retrieved by full id. It distinguishes itself from the only sibling by naming search_events as the origin of the id, so the agent knows this is the detail step, not the discovery step.

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?

Gives clear context: the id must come 'from search_events', and it prescribes a downstream workflow (open detailUrl, follow the ticket link, verify before purchasing). It also states a negative boundary ('this tool does not book or buy tickets'). It stops short of naming a specific alternative booking tool, so it's clear context without full when-not routing.

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