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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds one genuine behavioral fact beyond the annotations: results are returned newest first. It says nothing about pagination behavior or how cursor/limit interact, which is the remaining gap.

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 tight sentence with no filler, and the group scope and ordering are front-loaded. It is not padded, though it is arguably too terse for a paginated endpoint.

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?

An output schema exists, so return values need not be explained, but for a paginated list tool the cursor/limit mechanics and the status-filter semantics are undocumented everywhere. An agent cannot tell how to page or what the enum values mean in practice.

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%, so the description carries the burden for all four parameters. It explains only the group scope and the optional status filter; limit and cursor – the pagination controls – are left entirely undefined in both schema and prose.

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?

Names the resource (payments), the scope (of a group), and the ordering (newest first), which separates it from list_expenses, list_plans, and list_groups. It never uses an explicit verb, but the resource and scope make the operation unambiguous.

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?

'optionally filtered by status' hints at how to narrow results but gives no when-to-use guidance and never routes the agent among alternatives such as get_balances, list_expenses, or get_settlement_plan. No prerequisites or exclusions are stated.

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