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

Beyond the annotations (non-read-only, idempotent, non-destructive), the description adds meaningful operational context: the action is scoped to one's own seat, requires a private participant_token, and treats expired seats differently from voluntary departures. This enriches the agent's understanding without contradicting any annotation.

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 short sentences carry distinct, non-redundant information. The core purpose is front-loaded, followed by requirements and a behavioral caveat. There is no filler or unnecessary elaboration.

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 two-parameter, idempotent, non-destructive tool, the description covers purpose, required identifiers, and the expired-seat reporting nuance. There is no output schema, and the description only hints at result semantics ('reported as expired'), but overall this is a compact and sufficiently complete definition for the tool's simplicity.

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?

With 0% schema description coverage, the description must compensate for the two required parameters. It names both participant_token and visit_id and adds that the token is private, but it does not explain how to obtain them, how they relate to the seat, or the specific role of visit_id beyond its name. This is minimal but sufficient for a simple two-parameter call.

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 opens with a concrete action ('End your own seat') and a clear outcome ('return to your task'). The qualifier 'your own' plus the required private participant_token clearly separates this from sibling tools like cafe_take_seat, cafe_read_table, and cafe_say.

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?

It indicates when to use the tool: to voluntarily end one's own seat without needing explanation or follow-up. It also implies a distinction for non-voluntary departure via 'Expired seats are reported as expired rather than voluntary departures,' though it does not explicitly name an alternative tool or state exact when-not-to-use conditions.

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