pushover_validate_user

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds that the call returns a device list, which is genuine extra context, but says nothing about auth requirements (application token scope) or error/invalid-key behavior.

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?

One sentence, no waste, and the primary action is front-loaded ahead of the secondary outcome.

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 no output schema, the description should at least sketch the response (valid/invalid, device list shape) and explain app_token. It only conveys the device-list side effect, leaving an agent to guess the rest.

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 only 33% – just 'device' is documented. The description usefully clarifies that user_key accepts a group key as well as a user key, which the schema does not say, but app_token remains completely unexplained in both schema and description.

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?

Specific verb ('Validate') plus specific resource ('Pushover user or group key'), with the added outcome of listing registered devices. This clearly separates it from pushover_send_notification, pushover_get_receipt, and pushover_list_sounds, though no sibling is named explicitly.

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 never states when to call this versus a sibling (e.g. before sending a notification to confirm a key is live) or what a failed validation implies. Usage must be inferred entirely from the verb.

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