Add Server to Placement Group

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

Annotations indicate readOnlyHint=false (mutation) and destructiveHint=false. The description adds a key behavioral constraint (server must be powered off), which is valuable beyond annotations. It does not detail error handling or reversibility, but the precondition is significant.

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 two sentences, no redundant information. It is front-loaded with the purpose immediately, making it efficient and easy to parse.

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 action (add server to placement group) with two required parameters and no output schema, the description covers the purpose and a critical precondition. It lacks a mention of the return value or side effects, but for a straightforward mutation, it is reasonably complete.

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 already provides clear descriptions for both parameters (Server ID, Placement group ID) with 100% coverage. The description does not add further parameter-level semantics beyond the schema, so it meets 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?

The description clearly states the action: 'Add a server to a placement group.' It uses a specific verb and resource, and the sibling list includes distinct tools like 'remove_server_from_placement_group' and 'create_placement_group', so the purpose is well-defined.

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 explicitly states a prerequisite: 'The server must be powered off before it can be added.' This provides important usage context. However, it does not mention when to use this tool versus alternatives (e.g., 'remove' or 'create' tools), which would be helpful.

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