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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description still adds real value by stating the key behavioral guarantee — it does not consume/invalidate the code — and by naming the returned facets in the absence of an output schema.

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?

One sentence, front-loaded with the verb and resource, with the distinctive non-consuming constraint at the end. No redundant or filler content.

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 single-parameter read-only tool with full annotation coverage, the definition supplies the essentials plus the non-consuming guarantee. The only gap is the lack of any note on error/not-found behavior, which is minor given the read-only nature.

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 description coverage is 0% for the single required 'code' parameter, so the description must carry the burden and largely does not. It never says where the code comes from, what format it takes, or what an invalid/unknown code yields, leaving the parameter semantics to inference from the word 'pairing code' alone.

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 gives a specific verb ('Reads') and resource (a pairing code's status), and enumerates the exact facets exposed: validity, expiry, claimed status. It is clear what the tool does, though it does not explicitly contrast with any sibling since none of the listed siblings deal with pairing codes.

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?

Usage is only implied: 'without consuming it' hints at a preflight/inspection use case before claiming, but the description never states when to prefer this over actually claiming or cancelling a code, nor any prerequisites. No explicit alternative is named.

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