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

Annotations already declare readOnlyHint=true, so safety is covered; the description goes further by disclosing the JSON:API response shape ({ data, links }), the cursor pagination model, and a PII warning on returned objects. That is meaningful context beyond the structured fields. It stops short of describing default page sizes or 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?

Front-loads the verb+resource, then filters, pagination, return shape, and a PII caveat in a compact package with no filler. The single dense sentence is slightly overloaded but every clause earns its place.

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?

With no output schema, the description compensates by explaining the return shape, cursor pagination, filterable fields, the underlying endpoint, and a PII caveat. For a read-only list tool, an agent has everything needed to call it correctly.

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%, so every parameter is already documented in the schema, including the page_after/page_before cursor semantics and the two filters. The description largely restates links.next/links.prev already present in the schema, so it meets the baseline rather than adding new meaning.

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 (List) and resource (transactions), and even defines what a transaction is ('records submitted for transaction fraud/monitoring analysis') plus the underlying REST endpoint. It does not explicitly differentiate from sibling persona_get_transaction, though list-vs-get is inferable from the name.

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?

Provides implied usage by naming the optional filters (reference_id, transaction_type_id) and the pagination mechanism, but never states when to prefer this over persona_get_transaction or how pagination should be driven across pages. No exclusions or alternatives are given.

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