Activate Subscription Offer

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

With no annotations, the description carries the full burden. It does disclose the behavioral effect ('making it available to eligible subscribers') and the read-only mode restriction, which adds value. However, it does not mention permissions, reversibility, or impacts on existing active offers.

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 two sentences and every sentence earns its place. The primary action and effect are front-loaded, and the read-only mode restriction is a concise, relevant addition. No filler or redundant restatement of the tool name.

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?

For a four-parameter mutation tool with full schema coverage and an output schema present, the description is reasonably complete. It explains the purpose, the effect, and a key environmental constraint. It could add preconditions about the offer's current state, but nothing critical is missing for invocation.

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 schema covers all four parameters with per-field descriptions, so the baseline is 3. The description adds no parameter-level detail beyond the schema. The tool's action itself makes the role of offer_id clear, but no extra semantics are provided.

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 uses a specific verb ('Activate') and a specific resource ('subscription offer'), and states the resulting effect: 'making it available to eligible subscribers.' This clearly distinguishes it from siblings like deactivate_subscription_offer and activate_base_plan by resource 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?

There is no guidance on when to use this tool versus alternatives such as activate_base_plan or activate_purchase_option_offer. The only usage-related note is 'Disabled in read-only mode,' which is an environment constraint rather than a selection criterion. It does not state prerequisites or exclusions.

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