MarathonSetModeratorsForPupil

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

The description only says 'Assign', which implies mutation, but it does not add meaningful behavioral context beyond the annotations. It fails to disclose whether the call replaces or appends moderators, how invalid IDs are handled, or any side effects. Given openWorldHint=true and idempotentHint=false, more behavioral detail is needed.

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 a single clear sentence with no filler or redundant content. The action and object are front-loaded, making it immediately scannable for an agent.

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?

The tool is simple with two documented parameters and no output schema, so the core invocation information is present. However, the description does not clarify the assignment semantics (replace vs. add), and with no output schema the agent cannot anticipate the return value. It is adequate but not 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?

Schema description coverage is 100%: both bodyMarathonPupilId and bodySelectedModeratorsIds have descriptions. The tool description itself adds no parameter-specific meaning, but the schema already documents the two inputs, so the baseline of 3 is appropriate.

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 uses a specific verb ('Assign') and clearly identifies both the target ('marathon pupil') and the object being assigned ('moderators'). This explicitly distinguishes it from the inverse sibling MarathonSetPupilsForModerator and from the unset operations.

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 gives no guidance on when to use this tool versus alternatives such as MarathonUnsetModeratorsForPupil or MarathonSetPupilsForModerator. It also does not mention prerequisites, whether the assignment replaces existing moderators, or any conditions that should trigger this call.

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