get_return_track_sends

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

No annotations are provided, so the description carries the full burden. It discloses the return behavior ('Returns the list of sends on a return track with their names and values'), but does not mention error conditions, side effects, or any required permissions. For a read-only getter, this is adequate but not comprehensive.

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 concise and well-structured: a one-line summary, a follow-up sentence describing the return value, and a clear Args section. No filler or redundant statements are present.

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 getter with one parameter and an output schema, the description covers the purpose, parameter semantics, and return behavior. It is mostly complete, but it could add usage context (e.g., when to use this vs sibling tools) or edge-case behavior for an invalid index, which would make it fully comprehensive.

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?

The input schema provides only the type and title for return_index, but the description explicitly explains it as the zero-based index of the return track in the Args section. This fully compensates for the lack of schema-level description and adds clear meaning beyond the bare 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?

The description uses a specific verb and resource: 'Get the send values for a return track.' It clearly states what the tool does and distinguishes it from siblings like set_return_track_send (which sets a send) and get_return_tracks (which retrieves return track list). No ambiguity.

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 stating the tool returns send values for a return track, but it does not explicitly mention when to use this tool over alternatives such as get_track_routing or set_return_track_send. There is no discussion of exclusions or prerequisites like ensuring the return index is valid.

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