update_prestissimo_engine

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

No annotations are provided, so the description carries the full burden. It discloses a known API limitation (description cannot be updated alone) and notes that setting restart_type to 'force' triggers a restart. It does not detail other behaviors like auth needs, idempotency, or error states.

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 well-structured: an opening sentence, an important warning, and a bullet-like Args list. It is slightly repetitive as the warning about description needing an additional field appears both in the main text and in the parameter description.

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 tool complexity (7 params, 1 required, a known limitation) and the presence of an output schema, the description covers the limitation, all parameters, and the return type. It lacks details on update semantics (merge vs replace) and potential errors, but is otherwise complete.

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% description coverage, so the description must compensate. It lists each parameter with a clear explanation, including constraints (e.g., description length 1-50) and behavioral notes (e.g., restart_type triggers restart). This adds significant meaning beyond the bare schema.

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 updates Prestissimo engine configuration in watsonx.data. The sibling list includes update_presto_engine and update_spark_engine, so the agent can differentiate by the engine type.

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 explicit guidance on when to use this tool (updating engine config) and includes a critical warning about the description field limitation. However, it does not explicitly state when not to use or suggest alternatives.

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