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

Discloses toggle behavior and ability to undo with checked_in=false, and host requirement. No annotation contradictions; annotations are neutral. Minor gap: no mention of side effects like notifications or state changes beyond the toggle.

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?

Two sentences, front-loaded with main action, no redundant information. Every sentence serves a purpose.

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?

Covers core functionality, requirements, and parameter semantics. Missing output schema, but description is sufficient for typical use. Slight lack of post-check-in behavior detail.

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?

Adds meaning beyond schema: explains checked_in parameter as toggle/undo mechanism. Schema coverage is 0%, so description compensates with usage context. Could elaborate on event_id and guest_id roles.

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?

Clearly states it checks a guest in/out by toggling ticket status, and distinguishes from siblings like check_in_plus_one by specifying 'a guest' and event management context.

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?

Explicitly requires event_id and guest_id, and notes host requirement. Lacks explicit when-not-to-use or alternative tools, but context from siblings suggests check_in_plus_one for plus ones.

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