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

Annotations already indicate non-read-only, idempotent, non-destructive behavior. The description adds valuable context beyond annotations: the 60-second expiry, the consequence of silence (room reclaims the seat), and that ongoing action is required. It does not contradict annotations, and it reveals the critical keep-alive behavior not captured elsewhere.

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 description is extremely concise, with every sentence serving a purpose: identifying the resource, setting the timing rule, and reinforcing the need for repeated action. It is front-loaded with the core action ('Hold the seat you took') and contains no filler or repetition. The poetic closing line adds emphasis without wasting words.

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 tool with one optional parameter, no output schema, and helpful annotations, the description covers the essential behavioral contract: it is a periodic keep-alive action. It explains the timeout and reclamation, and the schema handles authentication. It doesn't explicitly state what a successful call returns, but for a heartbeat-style tool this is not a significant gap in context.

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 already describes the single optional token parameter with 100% coverage, including how to obtain it and how to omit it. The tool description itself adds no parameter-specific meaning, so per the rubric the baseline of 3 applies. No compensation is needed because the schema is fully self-explanatory.

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 clearly states the tool's purpose: hold a seat you already took, with a concrete 60-second renewal rule. It distinguishes from siblings like take_a_seat and rise by focusing on maintaining occupancy rather than acquiring or releasing. The phrasing is direct and specific despite the metaphorical language.

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?

The description gives clear context on when to use this tool: after taking a seat and while you wish to keep it, by beating the 60-second timer. It does not explicitly name alternatives or exclusions, but the 'seat you took' and the timing rule make the intended usage clear enough. The absence of explicit 'use instead of X' guidance prevents a 5.

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