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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description contributes beyond that by enumerating the fields the response carries (category, status, amount, disputed charge, evidence_required_by, evidence types), which substitutes for the absent output schema.

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 compact elements: a field inventory and the endpoint, with the purpose front-loaded. The field list is dense but earns its space given there is no output schema; nothing is redundant.

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 sparse, read-only list tool this is largely adequate — pagination and sort semantics live in the schema and return fields are named in the description. The notable gap is routing: it never explains how it relates to search_disputes or get_dispute, which is the main ambiguity an agent faces here.

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 coverage is 100% and all three parameters (page, sort, direction) carry their own descriptions and enums, so the description adds nothing parameter-specific. Baseline 3 is appropriate.

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 clear verb+resource ('List chargeback disputes') and even enumerates the returned attributes plus the underlying endpoint GET /disputes. It never distinguishes itself from the sibling pinpayments_search_disputes, so the agent must infer that this is the unfiltered listing variant.

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 by the 'List' verb and the 'GET /disputes' route; there is no explicit statement of when to choose this over pinpayments_search_disputes or pinpayments_get_dispute. No exclusions or prerequisites are given.

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