create_rack_chain

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

Annotations indicate a non-read-only, non-destructive operation, and the description adds that it can plan or create, and that omitting index appends—behavior not in the annotations. This is valuable context beyond the schema. However, it does not disclose the two-step dry-run/confirmation flow, which is implied by the schema's dryRun parameter, nor does it mention any side effects beyond appending. The description provides moderate additional insight beyond the 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 three short sentences, each carrying essential information: the core purpose, an important default behavior, and a distinction from separate functionality. It is front-loaded with the primary action and scope, and every sentence earns its place without redundancy or fluff. This is an exemplary level of conciseness for a tool with 8 parameters.

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?

The tool has 8 parameters and no output schema, so the description must cover high-level purpose and non-obvious behaviors. It does this by stating the scope (track types, nested racks), appending behavior, and separation from drum-pad assignment. The dry-run/confirmation process is documented in the schema's dryRun parameter, so the description does not need to repeat it. Overall, the description provides sufficient context for an agent to correctly invoke the tool, though it could mention the need for a confirmation token for actual creation (already in schema).

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?

With 88% schema description coverage, most parameters are already explained. The description adds semantic meaning to the index parameter by stating 'Omitted index appends,' which is not in the schema. This clarifies a key behavioral aspect. The description also indirectly clarifies the name parameter ('named empty chain'). Given the high schema coverage, the baseline is 3, and the description provides enough extra context to warrant a 4.

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 function: to plan or create a named empty chain in a specific rack, with scope including ordinary, Return, and Main tracks and nested racks. It distinguishes itself by noting 'Drum-pad assignment is separate,' which prevents confusion with related operations. The verb 'Plan or create' and the resource 'named empty chain' are both specific and unambiguous.

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 this tool (for creating chains) but does not explicitly mention alternative tools or when not to use it. It notes that drum-pad assignment is separate, which hints at a different tool, but it doesn't name the alternative or provide exclusion criteria. The context is clear but lacks explicit routing to alternatives.

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