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

readOnlyHint=true already tells the agent this is a safe read, so the description only needs to add context. It discloses the metric set, optional grouping, and the underlying Eventbrite endpoint, but says nothing about pagination, rate limits, or the shape of the response despite there being no output schema.

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?

One dense sentence with the payload description front-loaded; every clause carries meaning. The trailing 'Eventbrite: GET /reports/sales/.' is mildly extraneous but useful as a mapping hint.

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 an 8-parameter read tool with no output schema, the description conveys what comes back at a high level but omits return format details and any guidance on how period/date_facet/start_date/end_date interact. Adequate, with clear gaps.

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 all 8 parameters are already documented, which sets the baseline at 3. The description loosely echoes group_by ('by ticket, payment method, country, ...') and date_facet ('per time bucket') but adds no format or interaction detail beyond the schema.

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 names a specific resource ('Sales report for one or more events') and enumerates the returned metrics (gross, net, fees, royalty, quantity) per time bucket, which distinguishes it from list/get tools. It does not explicitly distinguish itself from the close sibling eventbrite_get_attendee_report, so it falls short of a 5.

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 when-to-use statement, no when-not-to-use, and no mention of alternatives such as eventbrite_get_attendee_report. An agent must infer that this is the financial-metrics view versus a per-attendee listing.

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