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

Annotations already declare readOnlyHint=true, so the safe-read nature is covered structurally. The description adds the underlying REST mapping (GET /payment-links/{id}), which is useful context, but says nothing about error behavior (e.g. not-found) or return shape. With annotations carrying the safety profile, this is adequate but not rich.

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 front-loaded sentence containing the action, the resource, the identifier, and the endpoint mapping. No filler.

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?

This is a simple one-parameter read tool with annotations and no output schema; the description covers what is fetched (details and status). It is complete enough to call correctly, though it could note error cases or confirm the id format contract.

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 parameter is fully documented with an example format there. The description repeats the 'pl_...' id format, adding mild reinforcement but no new syntax or constraints beyond the schema.

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 ("Retrieve") and resource ("Payment Link") plus the scope of what is returned ("details and status"). It is distinguishable from the create/list siblings, though it does not name or explicitly contrast with them.

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?

The description implies usage by requiring an id, so an agent knows this is a single-record lookup. However, there is no explicit when-to-use guidance, no prerequisites (e.g. payment link must exist), and no mention of alternatives such as get_payment or list operations.

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