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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds real value beyond that by stating the downstream consequence — the device stops receiving pushes — which clarifies the scope of destruction (delivery stops, rather than historical push data being purged). It doesn't say whether removal is reversible or how to re-register.

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?

A single compact clause with the action first and the effect second; no filler, nothing buried.

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 one-parameter destructive tool with full annotations and no output schema, this covers what an agent needs to select and call it. Minor gaps (behavior on an unknown/already-removed id, re-registration path) are not disqualifying.

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 description coverage is 100%, including the 'dev_...' id format, so the schema does the work. The description only echoes 'by id' and adds nothing about format or behavior for an unknown id, matching the baseline of 3.

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 and resource ('Remove one device') plus the id-based scope, which cleanly separates it from list_devices and register_device. It doesn't name a sibling explicitly, so it stops short of a 5.

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?

'one device by id' implies no bulk removal and that a valid id is required, but there is no explicit when-to-use guidance or statement of prerequisites/alternatives. Usage must be inferred from the sibling set.

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