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

Annotations already declare readOnly=false, destructive=true, idempotent=true, openWorld=true, so the safety profile is partly covered. The description still adds real behavior beyond them: credit-cap consumption, that approved delivery may publish to connected channels (external side effect), and the automation-type match constraint. It does not explain what is destroyed or what authorization is required, leaving a small gap.

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?

Three short, front-loaded sentences that open with the action and avoid padding. The final clause ('Only written carousel sections') is cryptic and slightly ambiguous, but the overall structure is efficient.

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?

An output schema exists so return values need not be described, and the annotations carry the safety profile. However, for a destructive, open-world mutation with four fully undocumented required parameters, the description omits prerequisites, permission needs, and what the revision/idempotencyKey guards against.

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 0% and the description never maps meaning to brandId, automationId, revision, or idempotencyKey. The concurrency-control semantics of revision and the replay-safety purpose of idempotencyKey are entirely undocumented in both places, so the description fails to compensate for the coverage gap.

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 clear verb (activate) and resource (recurring carousel generation using the saved recipe and credit caps). It distinguishes itself from the activate_*_automation siblings by scoping to carousel sections and requiring the saved automation type to match, though it never names a specific sibling or the prepare_* counterpart.

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 only implied: 'the saved automation type must match this tool' hints at a prerequisite (a previously prepared carousel automation) but there is no explicit when-to-use, when-not-to-use, or routing to prepare_carousel_creator_automation / pause / resume siblings. An agent must infer the workflow from the name.

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