Assign devices to group

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

The description adds minimal behavioral context beyond the annotations. It reveals the HTTP POST endpoint, which is consistent with the readOnlyHint=false, but does not disclose handling of existing assignments, idempotency, error behavior, or side effects. The openWorldHint=true suggests additional side effects, but nothing is explained.

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 short but repetitive: the first two sentences restate the same idea, and only the endpoint adds new information. It is not excessively long, but the redundancy wastes words that could have been used for context.

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?

Given the simple 2-parameter schema and available annotations, the description is adequate for a basic understanding. However, it lacks any mention of response format, edge cases, or relationship to other group/device tools, so it is not fully complete for an agent making informed decisions.

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?

The input schema covers both parameters with clear descriptions (group ID and array of device IDs). The description adds no extra parameter semantics or usage details, so the baseline of 3 applies due to full schema coverage.

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 clearly states the tool's action: assigning devices to a group. It specifies the resource (devices) and target (group), and the endpoint further clarifies the operation. It distinguishes from sibling tools like removeGroupDevices by focusing on assignment.

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. The description does not mention the inverse operation (removeGroupDevices) or any conditions, prerequisites, or exclusions. Usage is implied only by the tool's name and title.

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