set_rack_chain_note_routing

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

Annotations already declare readOnlyHint=false and destructiveHint=false, indicating a mutation that is not destructive. The description adds key behavioral details beyond this: the dry-run/plan distinction and the layering behavior ('Occupied destinations layer chains rather than replace sounds'). These are valuable traits not captured by annotations. It does not mention permissions or reversibility, but the disclosed behavior is significant.

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 sentences, front-loaded with the core purpose and immediately followed by a critical behavioral note. Every word earns its place; no redundancy or fluff. It is concise while conveying the essential distinctions.

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 9 parameters, 4 required, and a two-phase dry-run/confirm workflow. The description mentions 'Plan or reassign' but does not explicitly walk through the required sequence (dry run → hash → confirmation). It also lacks any mention of return values or output structure (no output schema). The layering behavior is covered, but the overall workflow is under-specified for an agent to correctly invoke without additional schema digging.

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 78%, which is just below the high threshold, so the description is expected to compensate for gaps. The description hints at outputNote ('change its instrument output note') but does not explain inputNote or the interplay between them. The dry-run parameters (planHash, confirmationToken) are explained in the schema, not the description. The description adds marginal value for parameters, and the undocumented inputNote/outputNote remain partially unclear.

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 action: 'Plan or reassign a Drum Rack chain to a MIDI pad note' and mentions the optional output note change. It distinguishes itself from potential siblings by noting the layering behavior, though it doesn't name specific alternatives. The purpose is specific and actionable, but could be slightly sharper with an explicit sibling comparison.

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 a two-phase workflow ('Plan or reassign') and notes that occupied destinations layer rather than replace, which gives some usage context. However, it does not explicitly state when to use this tool versus other routing or pad tools like set_drum_pad_state or move_device_to_chain, nor does it provide exclusions. Guidance is present but not explicit.

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