get_rack_chains

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

The description adds behavioral context beyond the readOnlyHint annotation by explicitly stating that the tool lists 'previously unreachable nested devices,' which is important for understanding the tool's value and behavior. No contradiction with annotations.

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, well-structured sentence that front-loads the purpose and includes a usage tip. Every part earns its place with no wasted words.

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?

Given the presence of an output schema (no need to explain returns), the description is fairly complete for a list tool. It explains what is listed and hints at follow-up actions. However, it could mention that the device must be a rack.

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 has 0% coverage (no descriptions for parameters), so the description should compensate. The description implies the tool works on a specific track and device but does not explicitly define track_index and device_index. With 0% schema coverage, more detail is needed to guide the agent on parameter usage.

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 clearly states the tool lists an Instrument/Effect Rack's chains and the nested devices within each chain. It uses a specific verb (List) and resource (Rack's chains and devices), and distinguishes it from sibling tools like get_device_parameters by noting that these nested devices were previously unreachable.

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 provides clear context for when to use this tool (to list rack chains and nested devices) and directs the agent to use set_chain_device_parameter to control them after listing. However, it does not explicitly state when not to use it or compare it to other list tools.

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