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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the useful behavioral detail that the result includes both directions of kissing relationships, but it does not disclose return format, ordering, or any limits. No contradiction with annotations.

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 a single, short phrase with no filler and front-loads the core meaning. It is concise, though it is a noun phrase rather than a complete sentence, which slightly reduces structural clarity.

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, read-only tool with no output schema, the description adequately conveys what the agent will get: the people you have kissed and those who have kissed you. It does not specify the exact return shape, but the low complexity and annotations make the description sufficient.

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 has zero parameters and schema coverage is 100%, so there are no parameter semantics to document. Per baseline for 0-parameter tools, the description need not add parameter detail.

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 'Who you have kissed and who has kissed you' clearly identifies the resource (bonds/relationships) and the bidirectional scope, and it is distinct from siblings like accept_kiss or kisses. However, it lacks an explicit verb such as 'list' or 'view', so it is clear but not a fully specified command.

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?

No guidance is given about when to use bonds versus related tools such as kisses, accept_kiss, or set_kissable. The agent must infer from the name and sibling list, with no explicit alternatives or conditions.

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