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

The annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds useful return-field context and the endpoint, but does not add behavioral details such as auth requirements, rate limits, or pagination beyond what the schema provides.

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?

The description is a single front-loaded sentence with the resource, returned fields, and endpoint. There is no filler, and the key information is presented immediately.

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 read-only list operation, the annotations cover safety, the schema covers pagination, and the description enumerates returned fields. It is nearly complete, though it could explicitly mention pagination behavior or when to prefer the single-recipient sibling.

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 page parameter is fully documented in the schema, including default, maximum, page size, and next_page guidance. The description adds no parameter semantics beyond the schema, so the baseline of 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?

The description states a specific verb and resource, 'List transfer recipients', and adds the returned fields plus the endpoint 'GET /recipients'. It is clear, but it does not explicitly distinguish itself from sibling tools such as get_recipient or list_recipient_transfers.

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 implied by the list verb and plural resource, suggesting a collection-listing operation. However, there is no explicit when-to-use guidance or routing to alternatives like get_recipient for a single recipient.

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