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 nothing behavioral beyond that – it simply restates the HTTP route, giving no information on error/not-found handling, scope of the returned transaction, or rate behavior.

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 sentences, front-loaded with the essential fact (single transaction by id). The trailing endpoint path is mildly redundant wikitext rather than useful guidance, but it costs little.

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 simple annotated read with two fully documented parameters, the description is adequate to invoke it correctly. However, with no output schema present, it says nothing about what fields a transaction record contains or how embeds affect the response, leaving that to discovery.

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 100%, with both 'transaction_id' and 'with' fully documented including the embed pattern, so the description need not explain parameters. It adds no meaning beyond the schema, which is the expected baseline at full coverage.

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 states a specific retrieval action and resource: one payment transaction, keyed by id. The phrase 'by id' implicitly distinguishes it from cratejoy_list_transactions, though no sibling is named. It is clear what the tool returns at a high level.

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: an agent infers it should call this when it already holds a transaction id and wants the single record rather than a list. There is no explicit when-to-use, no prerequisite (e.g. needing a valid id from list_transactions), and no stated alternatives.

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