get_chain_info

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

No annotations are provided, so the description must disclose behavioral traits. The verb 'List' implies a read-only operation, but the description does not explicitly state safety, auth requirements, or side effects. It does not contradict annotations (none present) but adds minimal transparency beyond the functional intent.

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 two concise sentences plus a parameter list. It is front-loaded with the main purpose and efficiently explains all parameters without unnecessary elaboration. Every sentence earns its place.

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?

With an output schema provided, the description does not need to detail return values. It covers the main use cases (listing chains or devices) and the drill-down logic via chain_index, making it complete for a read-only list tool. It does not discuss edge cases or performance, but these are not critical for this simple operation.

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 description thoroughly explains each parameter: track_index is 1-based, device_index has default 1, and chain_index clarifies its special value 0 means list all chains. This adds significant meaning beyond the input schema, which only provides titles and defaults with no descriptions, fully compensating for the 0% schema coverage.

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's purpose: "List chains in a rack device, or devices within a specific chain." This is a specific verb+resource combination that distinguishes it from sibling tools like get_device_parameters or get_track_info, which focus on other aspects of the session.

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 when to use the tool—when you need chain/device information in a rack—but it does not explicitly mention when not to use it or provide alternative tool suggestions. It lacks explicit exclusions or when-to-use guidance beyond the functional description.

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