pennylane_update_billing_subscription

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

Annotations already declare the safety profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false). The description adds genuinely new behavioral context beyond the annotations by stating 'Seuls les champs fournis sont mis à jour', i.e. partial/merge semantics. It stops short of describing permissions, side effects on subscriptions, or reversibility.

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?

Two short sentences, front-loaded with the operation and followed by the key behavioral note. Every sentence carries information; no filler.

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, full annotation coverage, and 100% parameter descriptions, the structured fields carry most of the burden. The description supplies the operation and partial-update semantics, which is enough for correct invocation, though it could note the required id or any permission constraints.

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 100%, with each parameter documented in French in the schema itself, so the baseline is 3. The description adds no syntax or format detail beyond what the schema already provides.

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 and resource ('Modifie un abonnement de facturation existant'), making it clearly an update operation on a billing subscription. It distinguishes from list/get/create siblings by the verb and the word 'existant', though it does not explicitly name an alternative tool.

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 by 'existant' (use it to modify an already-existing subscription, not to create one), and the second sentence clarifies partial-update behavior. However, there is no explicit when-to-use/when-not guidance or stated prerequisites versus the create/get siblings.

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