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

Adds real signal beyond the annotations by stating the tool "opens nothing by itself" and returns a step-by-step walkthrough of screens, buttons and fields — this confirms and explains readOnlyHint=true rather than merely repeating it. It does not say whether the returned guide is generic or tailored to a particular event, which matters given zero parameters.

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 two lead sentences about what the tool does and how it is followed up are well front-loaded and earn their place. The closing sentence about Eventbrite's public REST API, MCP server availability and lack of event search is unrelated trivia that consumes roughly a third of the text without affecting invocation.

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 zero-parameter, no-output-schema tool, the description adequately covers both what comes back (screens, buttons, fields) and the next action to take. The remaining gap is how an agent should use the returned steps when it has supplied no event or code details, and the trailing API commentary distracts from that.

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?

The schema has zero parameters and 100% coverage, so there is nothing for the description to disambiguate; baseline of 4 applies. The description could have usefully noted that no arguments means the guide is generic and must be adapted to a specific event, but that omission is minor.

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?

Names a specific verb and resource ("Create promo code") and scopes it to "the user's own Eventbrite account," which separates it from the read-oriented siblings like eventbrite_list_events. The verb is slightly over-sold, since the tool does not actually create anything, but the description immediately corrects course with "Returns how to do it in Eventbrite step by 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 a clear operational context: call this first for guidance, then "do it with the cotlet_browser_* tools in the user's Eventbrite Cloud Browser" — a concrete follow-up path that an agent can act on. It stops short of explicit exclusions, e.g., it never says what to do if the Cloud Browser session is not open or when to skip this guide and act directly.

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