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

Annotations declare readOnlyHint=false and destructiveHint=false, so the mutation/non-destructive profile is already covered. The description adds genuine context beyond that: the character 'leaves the room until your next request', disclosing that the effect is a non-permanent state change rather than a destructive one.

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?

A single front-loaded sentence with the primary effect first and the clarifying consequence after the colon. No wasted words and nothing buried.

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 action with no output schema and annotations already covering the safety profile, the description gives what an agent needs: the effect and its non-permanent scope. It stops just short of stating any confirmation or side-effect nuance, which is a minor gap.

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 tool takes zero parameters and the schema is an empty object, so there are no parameter semantics to communicate. Baseline 4 applies; the description correctly implies no arguments are needed.

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 effect: 'Ends your visit' with the concrete consequence that the character leaves the room. It is clearly distinguishable from movement siblings like travel or use_door, though it does not name any of them to draw the contrast explicitly.

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 phrase 'Ends your visit' implies the usage context (terminating the session/leaving the room), but there is no explicit when-to-use guidance or comparison to the adjacent movement tools such as travel or use_door. Usage must be inferred.

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