set_device_parameters

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

Goes well beyond the annotations (readOnly=false, idempotent=true, destructive=false, openWorld=false) by disclosing error semantics: individual failures are collected in 'errors' and do not abort the remaining writes. It also documents the name-resolution strategy (exact, then original name, then unique substring) and the raw-vs-display value contract.

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?

Front-loaded purpose sentence, then the values contract, then an example. Dense and mostly waste-free, though the parenthetical unit list is long and the example partly repeats the preceding rules.

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?

No output schema exists, and the description compensates by naming what is returned (each new value plus display string, and an 'errors' collection). Combined with the value-format and name-matching rules, an agent has everything needed to invoke this correctly despite zero schema descriptions.

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 coverage is 0%, so the description must carry the load, and it does for the nested 'values' object: key type (parameter name or index), accepted value forms (raw numbers bounded by get_device, display strings with units, switch/chooser item names), and a concrete example. Track and device, however, are never described (integer vs name vs array is left to the schema's anyOf).

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?

States a specific verb+resource with a scope qualifier ('several device parameters in one call') and notes the return payload. The 'in one call / several' framing implicitly distinguishes it from the single-parameter sibling set_device, but it never names that sibling explicitly.

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?

Usage is implied rather than stated: the batch scoping hints at when this beats set_device, but there is no explicit when-to-use/when-not guidance or precondition (e.g., device must exist, parameters must be from get_device). The failure-tolerance note ('without stopping the others') is useful context but not selection guidance.

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