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 does add one genuine behavioral trait beyond the annotations — that the read is non-consuming/idempotent with respect to the code — but says nothing about the required controlToken credential or any 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?

A single front-loaded sentence with no filler; the operation, its scope and its key non-destructive property are all in one clause.

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 two-param read tool with no output schema, an agent still needs to know what the two parameters are (especially the credential-like controlToken) and roughly what statuses come back. The description covers the resource and the read semantics but leaves both parameters and the response shape unspecified.

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% and neither parameter is documented in the schema. The description only loosely maps to 'code' via the phrase 'pairing code'; the required `controlToken` (minLength 20, clearly a credential) is entirely unexplained, so the description fails to compensate for the coverage gap.

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?

States a specific verb (reads) and resource (pairing code) plus the exact facets inspected: validity, expiry, claimed status. The phrase 'without consuming it' cleanly separates it from a claim/consume operation, though no sibling tool in the list overlaps with pairing, so there is nothing to differentiate against.

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?

'Without consuming it' implies the use case (inspect a code before claiming it), but the description never states when to use this versus actually claiming the code, nor any preconditions. Usage is inferred rather than specified.

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