Remove a pre-assigned device from a user

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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=true and openWorldHint=true, so the safety and repeat-call profile is covered elsewhere. The description adds useful scope context by clarifying that what is removed is an identifier such as a serial number, not the device itself. It does not say what happens when the identifier is not currently assigned, nor whether the device record is affected.

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 short sentence that front-loads the action and resource, with no wasted wording. It is lean to the point that it omits any routing or failure information.

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 two-parameter mutation with no output schema and reasonable annotation coverage, the definition is minimally adequate. It leaves out error behavior (identifier not assigned), confirmation of the idempotent semantics in prose, and any note on side effects to the device.

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 50%: 'email' is documented in the schema but 'identifier' has no schema description. The description partially compensates by explaining that the identifier is a pre-assigned device identifier such as a serial number. It still does not state the accepted identifier formats or whether it must match an existing assignment.

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 states a specific verb+resource pair (remove a pre-assigned device identifier from a user) and clarifies the resource with an example ('e.g. serial number'). It is distinguishable from the inverse sibling assign_device_identifiers_to_user, though it never names that sibling 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?

There is no when-to-use or when-not-to-use guidance and no reference to the obvious alternative (assign_device_identifiers_to_user) or to remove_device_tag / remove_user_tag. The agent must infer the use case purely from the tool name.

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