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

The annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, and the description reinforces this with 'Changes nothing.' More importantly, it discloses the shape of the result: a breathing exercise, a video if the user has more time, and a one-line offer, which is valuable because no output schema exists.

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 purpose and core behavior are front-loaded in the first sentence, and the long trigger list supports usage selection. The sentence is somewhat dense and list-heavy, but the content is mostly relevant rather than redundant.

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 simple two-parameter, read-only recommendation tool with no output schema, the description gives enough context to understand what it returns and when it is appropriate. It does not describe fallback behavior if no reset matches or how the one-line offer is formatted, but those are relatively minor 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 coverage is 100%, so both parameters are already documented in the input schema. The description only indirectly gestures at them through phrases like 'if they have more time' and 'what the user said or is going through,' adding little semantic 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 states a specific verb and resource: getting a short, fitting Reulay reset to offer the user. It explains the returned package, including a breathing exercise, an optional matching video, and a one-line offer, and distinguishes the tool from start-oriented siblings by clarifying that it changes nothing.

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 extensive when-to-use guidance across stress, anxiety, meetings, interviews, focus problems, low energy, difficult conversations, sleep trouble, and even mid-work breaks. It does not explicitly name alternatives such as start_breathing_exercise or recommend_experience, so sibling routing is implied rather than fully specified.

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