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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so safety is covered. The description adds useful return-shape context (contact details, notes, interactions, preferences) and the underlying endpoint, but says nothing about pagination, auth, or rate limits.

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 short fragments, front-loaded with the core purpose and return contents, with the endpoint as a trailing implementation hint. No wasted 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 one-parameter read tool with full schema coverage, safety annotations, and no output schema, the description does enough: it identifies the lookup key and enumerates the returned content. It could be stronger by distinguishing the by-id path from the by-email sibling, but nothing needed to call it correctly is missing.

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?

With 100% schema description coverage the single guest_id parameter is already fully documented in the schema, so baseline is 3. The description's 'by id' confirms the id lookup semantics but adds no syntax or format detail beyond what the schema provides.

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 names a specific verb ('get') and resource ('guest') and scopes it to a single record by id, which implicitly contrasts with tokeet_list_guests and tokeet_get_guest_by_email. It stops short of naming those siblings explicitly, so the differentiation is inferable rather than stated.

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?

There is no explicit when-to-use guidance and no alternatives named. An agent must infer from 'by id' that this is the lookup path when a guest id (not an email) is available, but the description never tells the caller when to prefer this over tokeet_get_guest_by_email or tokeet_list_guests.

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