activate_purchase_option_offer

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only discloses that the operation is disabled in read-only mode, but for a state-mutating activation, it omits important details: whether activation is idempotent, what side effects or consequences occur to existing active offers, and how the offer lifecycle changes after activation. More disclosure is needed for a complex state-change operation.

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 efficient sentences deliver the core purpose and the only critical operational constraint. Every word earns its place with zero redundancy. This is an excellent example of optimal density.

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 all 4 required parameters documented, an output schema, and a clear purpose; however, for an activation operation, additional context about post-conditions (e.g., how to verify activation, rollback possibilities, or relationship to offer states) would round out the description without burdening the agent.

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 100% with each of the 4 parameters briefly described (e.g., 'App package name', 'Parent one-time product ID'). The description adds no parameter-level detail beyond what the schema already provides, so the baseline of 3 is appropriate.

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?

Uses a specific verb ('Activate') with a clear resource ('a one-time product offer') and explains the purpose ('making it available to eligible buyers'). The sibling list includes deactivate_purchase_option_offer, so the scope is clearly differentiated from its opposite operation.

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 includes 'Disabled in read-only mode,' which implicitly tells the agent when not to call this tool (in read-only contexts). However, there is no explicit naming of alternatives (e.g., deactivate_purchase_option_offer for the reverse operation) or scenarios when to prefer this over a sibling. Usage context is implied, not explicit.

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