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

With zero annotations the description carries the full burden, and it does substantial work: authentication model (token as credential, scoped to exactly that alert), the fields 'view' returns, that 'delete' stops the alert, and a deliberate non-enumerable error behavior ('same invalid_alert_token refusal whether or not any alert exists'). It loses a point for not stating whether deletion is permanent or recoverable.

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?

Front-loaded with the verb-and-resource plus the credential model, then layered with return fields, security behavior, and legacy handling. Dense and mostly waste-free; the enumeration of returned fields is the one sentence that could arguably compress given the action 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?

No annotations and no output schema, so the description correctly compensates by naming the return fields for 'view' and the effect of 'delete'. Authentication, token provenance, error-shape, and legacy-alert handling are all covered. The only real omission is deletion permanence/irreversibility.

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 both parameters are already documented, including the enum semantics and the 'never put it in a URL' warning, so the description mostly restates existing text. The provenance note ('returned once') and the scoping claim add marginal enrichment, but this is the baseline-3 case where the schema does the heavy lifting.

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 specific verb pair and resource: view or delete a stored price-change alert, authenticated by the alert_token issued by register_price_alert. The credential/scope framing makes the tool's nature unmistakable. It stops short of a 5 because it never acknowledges the sibling delete_price_alert or list_price_alerts, so an agent must still infer why this token-scoped path exists alongside them.

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?

Gives clear operational context ('No API key needed: the alert_token is the credential') and one real exclusion ('Alerts registered before v1.81.0 have no token and are removed via the operator'). However, 'via the operator' is undefined, and it offers no guidance on when to reach for its 'delete' action versus the delete_price_alert sibling, leaving the main routing decision implicit.

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