Retrieve a payment link

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without the description. The description adds nothing beyond that — no statement about what happens with an unknown or expired link id, no error/not-found behavior, and no return-shape context (and there is no output schema to cover it).

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?

It is short and front-loaded, but it is also redundant — the second sentence says exactly what the first already said, with only the id format added. Nothing is bloated, but nothing earns its place beyond the name restatement.

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 single-parameter getter the annotations and schema carry most of the weight, but the description is effectively a name echo with no error semantics, no return information, and no dispatch rule against list_payment_links. With no output schema, the description should at minimum indicate what a retrieved payment link includes.

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% and the single `id` parameter is fully documented in the schema, so baseline is 3. The description merely echoes the same `plink_…` format hint already present in the schema, adding no new semantics such as validation, prefix constraints, or what happens if the prefix is wrong.

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 restates the name and title ('Retrieve a payment link') and then repeats the same statement with the id format appended. It never distinguishes this from siblings such as get_payment_link-relevant alternatives (list_payment_links, update_payment_link, create_payment_link) or explains what a payment link is in this API. Only the parenthetical `plink_…` prefix adds any information at all.

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 when-to-use guidance and no mention of alternatives — an agent is not told to prefer list_payment_links when it lacks an id, nor whether to use update_payment_link instead when mutating. The only implicit cue is 'by id', which is already evident from the required parameter.

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