ebay_update_notification_subscription

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

With no annotations, the description carries full burden for behavioral disclosure. It fails to mention that this is a partial update (only provided fields are modified), any side effects, or required permissions. The agent is left guessing about the tool's behavior beyond the basic action.

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 extremely concise at four words, but it sacrifices valuable context. While not verbose, it could be improved by adding a sentence about what can be updated or expected output. The current structure is minimal but not wasteful.

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?

Despite having 4 parameters including a nested object and no output schema, the description provides no details about return values, error conditions, or success indicators. The tool updates a subscription, but the agent is left uninformed about the response or how to handle results.

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%, and each parameter has a clear description in the schema (e.g., subscription_id, destination_id, status). The tool description adds no additional meaning beyond what the schema already provides, so it meets the baseline for this dimension.

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 'Update a notification subscription' clearly states the verb and resource, distinguishing it from siblings like create, delete, enable, or disable subscriptions. It is specific enough for an agent to understand the tool's primary action.

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?

No guidance is provided on when to use this tool versus alternatives such as ebay_enable_notification_subscription or ebay_create_notification_subscription. The description does not mention prerequisites, when not to use it, or how it compares to other update-related tools.

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